Titanium Powder Research Articles

Results of X-ray studies of titanium powder obtained for additive machines from OT4 alloy metal waste in alcohol

The results of experiments aimed at conducting X-ray studies of powders obtained by electrodispersing titanium alloy OT4 metal waste in alcohol are presented. It is noted that the particles of the electroerosion powder consist of titanium and aluminum, which form phases of pure titanium α-Ti, titanium oxide TiO and intermetallic Ti3Al. The conducted studies have shown that by the method of electroerosive dispersion of metal waste of the OT4 alloy, it is possible to obtain spherical titanium powders for additive machines of the required fractional composition from secondary raw materials in small batches with minimal energy consumption and minimal damage to the environment.

Исследование продуктов синтеза в механоактивированных смесях титанидов меди с углеродом

Metal matrix composites reinforced with dispersed carbide particles have an optimal combination of strength and wear resistance. The composites are used as structural materials, wear-resistant materials and coatings as well as functional materials. Copper matrix composites for electrical purposes are strengthened with particles of refractory compounds (carbides, borides, silicides). They are used to manufacture breaking electrical contacts which have increased resistance to erosion under the electric arc exposure. The highest arc erosion resistance is achieved by composites with a structure, in which submicron particles of refractory compounds are homogeneously distributed in the copper matrix. Powder technologies are used to obtain the copper matrix composites. A large number of publications concerns with the production of copper matrix composites strengthened by dispersed particles of titanium diboride. The composite powder was obtained by self-propagating high- temperature synthesis (SHS) occurring through mechanically activated mixtures of titanium, copper and carbon. The synthesis products were compacted by spark plasma sintering (SPS). In the present work, the microstructure, elemental and phase composition of the products of the synthesis reaction occurring through mechanically activated reactant powder mixtures of copper titanides with carbon (soot) subjected to additional heat treatment were studied using the methods of X-ray diffraction, optical and scanning electron microscopy. Copper matrix composites strengthened by carbide particles were obtained by copper reduction from intermetallic compounds (copper titanides) via reaction: TimCun+ C → TiC + Cu. The use of the copper titanides instead of titanium and copper powders eliminates the blocking of surface titanium-carbon reaction by copper during the mechanical activation of titanium-copper-carbon powder mixtures. This ensures a more complete conversion of titanium carbide in the synthesis reaction. It is established that the dispersion of the carbide phase in the structure of the synthesized ‘titanium carbide-copper binder’ composite depends on the elemental ratio of titanium and copper in the reaction mixtures. With an equiatomic content of titanium and copper the synthesis results in a matrix-type composite, in the structure of which submicron (less than 300 nm) carbide inclusions are homogeneously distributed throughout the copper binder. Unreacted copper and titanium in the titanide powders do not prevent the attainment of target phase composition of the synthesis products that include only titanium carbide and copper.

Synthesis of Nickel-Based Medical Alloys via Mechanochemical Processing and Powder Metallurgy Techniques

In this study, medical nickel alloys suitable for dental applications were synthesised by a combination of force chemical synthesis and powder metallurgy. Titanium and base powders were used, processed in a hydrogen atmosphere to obtain sub-micron particle sizes and homogeneously mixed by mechanical alloying techniques to optimise sintering and compaction properties. This method ensures perfect consistency of particle composition and morphology, essential for the subsequent sintering process, which densifies the material to a relative density of 98.96% while maintaining the precise shape and weight specifications required. Manganese, boron and cerium are added in moderate amounts to enhance bond strength with porcelain veneers without sacrificing corrosion resistance or causing discolouration. Boron content is controlled below 0.1 weight percent to reduce brittleness, and silicon is adjusted to maintain mechanical strength. The alloy's coefficient of thermal expansion is optimised and determined by dilatometry techniques to ensure compatibility with porcelain and compliance with industry standards for nickel-based dental alloys. Tested mechanical properties including yield strength, tensile strength and Vickers hardness showed robustness and resistance that surpassed most nickel-based alloys and competed with cobalt-based alternatives. The study concluded that the advanced synthesis technology used to produce the nickelcontaining medical alloy has improved mechanical, thermal and aesthetic properties, making it ideal for the manufacture of dental prostheses that require high precision.

Investigation of corrosion behavior of Al–TiO2 nanocomposite produced using air plasma spray and accumulative roll bonding method

This work is an attempt to study the Al–TiO2 nanocomposite properties applying accumulative roll bonding process. For this purpose, nano Titania powder was first coated on aluminum foil by air plasma spraying process. The nanocomposite was then fabricated in one, two, three, five, and seven cycles by ARB. To investigate the effect of ARB process cycles on an Al-5% wt. TiO2 nanocomposite, characterization tests including XRD, quantitative XRD analysis by MAUD software, FESEM, EDS, electrochemical impedance, and TAFEL polarization tests were performed on the samples. The results indicate that the crystallite size reduced from 156 to 31 nm and the dislocation density quadrupled in the composite. The results of XRD analysis showed an increase in the dislocation density in the composite when the number of cycles increases. The reduction of crystallite size and increase of the grain boundaries have caused a sudden increase in the dislocation density. As the ARB cycle increases, the local porosity decreases and the local cracks due to the separation of the titanium sprayed droplets disappear in the matrix phase, and the reinforcing phase has more diffusion in the matrix. With the increase of ARB cycles, the percentage of titanium and oxygen elements on the surface was decreasing, but they remained until the last cycle. Among the non-rolled and rolled samples in different cycles, ARBed samples after 1 cycle and 5 cycles had not only the lowest and highest corrosion current densities but also the highest and lowest total resistance (Rt), respectively. This indicates max corrosion resistance due to the decrease in defect and porosity resulting from plasma spray and min corrosion resistance as a result of formation of galvanic cell between Al-matrix and Ti-reinforcing particles, respectively.

Hot compaction of titanium powders with shear deformation

Hot compaction of titanium powders with shear deformation

Investigation of physical, chemical, and technological properties of titanium powder obtained by thermal dehydrogenation in vacuum

In recent times, there has been significant interest in powder metallurgy, driven primarily by the active development of additive manufacturing. Consequently, a pressing task is the development of methods for producing initial metal powders that are cost-effective while meeting high consumer standards. This research is a continuation of studies on titanium powders obtained through SHS hydrogenation and thermal dehydrogenation. The titanium hydride powders, previously obtained using SHS technology, were sieved, resulting in fractions that matched the granulometric composition of titanium powders of PTK, PTS, PTM, and PTOM grades. Subsequently, the titanium hydride powder samples underwent dehydrogenation through vacuum annealing in an electric resistance furnace. Throughout the dehydrogenation process, the kinetics of hydrogen release from the titanium powder were examined as a function of particle size. The macro- and microstructure, chemical composition, and technological properties of the dehydrogenated powders were thoroughly analyzed. It was determined that the titanium powder maintained its original polygonal fragmented shape after dehydrogenation. The average particle size decreased by 5–20 %, and “satellites” were observed on larger particles. Chemical analysis revealed that larger samples contained a higher level of residual hydrogen and gas impurities (Σ 0.77 wt. %) compared to finer powders (Σ 0.26 wt. %). Regarding the study of technological properties, the resulting powders exhibited the necessary characteristics for use in titanium powder metallurgy, with the exception of low flowability due to the particle shape and microstructural heterogeneity). In conclusion, this research has demonstrated the potential of the SHS hydrogenation and thermal dehydrogenation method in producing high-quality titanium powders.

Characterization of Transport Pathways in Electrolyzers Using Neutron and X-Ray Tomography

Electrolysis is a critical component to realizing a true green hydrogen economy. The performance and efficiency of an electrolyzer is directly tied to the multiphase transport that occurs within the porous transport layer (PTL). The PTLs must allow sufficient water transport to the catalyst layer to maintain the reaction while removing the product gases. PTLs are typically created from titanium foams or sintered from titanium powders or fibers. The resultant structure is heterogenous and requires 3D imaging to properly capture the pore structure and transport pathways. The use of titanium for the PTL can make it difficult to track the multiphase flow using X-rays alone as the X-ray energy required to penetrate 1 cm or more reduces the contrast between water and oxygen without the use of contrast agents that could affect the reaction. Neutrons provide a penetrating probe capable of imaging through titanium while having extreme sensitivity to water. Combing neutrons and high energy X-rays provides an easy way to identify all components in the PTL, i.e., the solid structure, oxygen, and water. The National Institute of Standards and Technology provides the Neutron Imaging Facility to the larger research community through the Center for Neutron Research facility user program. This instrument provides the ability to perform simultaneous neutron and X-ray tomography. Moving from 2D radiography to 3D tomography is critical to fully understand the influence of the PTL pore structure on the multiphase transport. This talk will give an overview of the instrument capabilities, showcase past success for neutron imaging of electrolyzers, and provide current progress on development of hardware and data reduction methods for simultaneous neutron and X-ray tomography of electrolyzers.

Incorporation of PEDOT:PSS to Reduce Iridium Loading at Anode Catalyst Layer for Proton Exchange Membrane Water Electrolysis

Proton exchange membrane water electrolysis (PEMWE) is one of the most promising technologies to produce green hydrogen with high efficiency. However, its commercialization is hindered by the large usage of expensive iridium as anode electrocatalyst [1-3] . Incorporation of cheap conductive materials into the catalyst ink, e.g., titanium powder [4], is a straightforward and efficient method to reduce noble metal loading of membrane electrode assembly (MEA). In this study, we aimed to use a conductive polymer PEDOT:PSS to build the low Ir loading catalyst layer for PEMWE.The MEAs at 0.3 mgIr cm-2 loading were fabricated with different PEDOT:PSS contents. In practice, the dispersion of IrO2 particles is difficult in catalyst ink, leading to the formation of big IrO2 agglomerates. We found that the zeta potential of the anode catalyst ink gained obvious enhancement after the addition of PEDOT:PSS. This indicated that PEDOT:PSS as dispersant could increase the stability of the catalyst ink. The morphology of anode catalyst layers was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The surface and cross-sectional images of morphology exhibited small IrO2 particles and porous structure in the catalyst layer with the addition of PEDOT:PSS, which would contribute to the water/gas movement in triple-phase boundaries. Electrochemical measurements such as polarization curves, electrochemical impedance spectroscopy (EIS), cyclic voltammogram (CV) and durability tests were conducted in a PEMWE single cell. The MEA using PEDOT:PSS as binder displayed better electrochemical performance (3.4 A cm-2@2.0 V) than other references with Nafion only (2.4 A cm-2@2.0 V). Moreover, the addition of PEDOT:PSS improved the high-frequency resistance due to its excellent electronic conductivity. In consideration of the conductive binder and dispersant effect of PEDOT:PSS, future research will focus on reducing Ir loading below 0.1 mg cm-2 through designing novel structure of anode catalyst layer with PEDOT:PSS. Keywords:PEM water electrolysis, low iridium loading, PEDOT:PSS

Prediction of Melt Pool Dimension, Porosity Generation and Thermal Behavior of Ti-6Al-4V during Powder Bed Fusion at Various Scan Speeds and Laser Powers

The additive manufacturing technology called laser powder bed fusion enables to manufacture complex parts based on the fusion of a metallic powder layer by layer. In laser powder bed fusion, the produced component quality relies significantly on the parameters of the process. In this study, the powder titanium alloy Ti-6Al-4V is employed for the purpose of predicting the melt pool dimensions. To manufacture a single bead, several combinations of scan speed and laser power are used. This research studies the influence of the scan speed and the laser power on the melt pool dimensions and on the thermal history of a specified layer of powder. The results reveal that the geometry of the melt pool is considerably responsive to the scan speed and the laser power. Furthermore, unfavorable effects such as porosity defects are analyzed in detail. Suggestions are presented to employ optimal settings to prevent these undesirable outcomes. To validate the numerical results, a comparison with experimental results from the literature is carried out. Our numerical analysis proves a satisfactory correlation with the experimental investigations. The beam power and the scanning speed effects on the average temperature of the desired layers are discussed as well.

Систематический обзор технологий производства металлической пены

Introduction. The paper presents a comprehensive overview of the manufacturing methods, materials, properties, and challenges associated with cellular metallic foams, primarily focusing on aluminum and titanium-based foams. Cellular metallic foams are gaining interest due to its unique combination of low density, high stiffness, and enhanced energy absorption capabilities. Cellular metallic foam is renowned for its special combinations of physical and mechanical characteristics, containing their increased stiffness, specific strength at high temperatures, light weight, and good energy absorption at relatively low plateau stress. It has extensive uses in the automotive, shipbuilding and space industries. It has high porosity, low relative density and high strength, which increases performance of the product. The aerospace and automotive industries require a material with a high strength-to-weight ratio. Methods. To meet this need, many metal foam production methods have been developed, such as melt route method, deposition method and powder metallurgy method. Melt route method is widely used to manufacture metallic foam as compared to other methods. Results and Discussion. In the production of aluminum foams, the melt route method is usually used. Titanium hydride (TiH2) has been a popular foaming agent, but its high decomposition rate and cost limitations have led to the development of alternative foaming agents, such as CaCO3 (calcium carbonate). Titanium foam is often manufactured using the space holder method. This method involves mixing titanium powder with a space holder material, forming a preform, and then sintering to remove the space holder and produce a porous structure as the space holder method allows for precise control over the properties of the foam, including pore size, porosity, and relative density. Results also indicate that porosity in cellular metallic foams can range from 50 % to 95 %, as reported in various journals. Pore structures can include mixed types, open cells, and closed cells, each offering different mechanical and thermal properties. It is also observed from various literature sources that relative density, which is the ratio of the foam's density to the bulk material's density, varies from 0.02 to 0.44 based on the production method used.

Preparation of NiAl-AlMg6 Functionally Graded Composite Using the Energy of a Highly Exothermic Ti-C Mixture during Self-Propagating High-Temperature Synthesis.

A functionally graded composite NiAl-AlMg6 was prepared using the pressure of gaseous reaction products (impurity gases) produced during the synthesis of reactive powders in a sealed reactor. It has been shown that this method can be used to prepare a NiAl/AlMg6 composite with both chaotically oriented pores in the NiAl layer and unidirectionally oriented pores (lotus-type pores). The pore shape in NiAl was found to be dependent on the pressure of the impurity gases and hydrogen present in the starting titanium powder. A mechanism for pore formation in NiAl and AlMg6 composite during SHS is proposed. Thus, functionally graded high-temperature composites can be produced by SHS in a sealed reactor using the chemical reaction energy and the pressure of impurity gases and hydrogen. Additionally, minimizing the influence of impurity gases on the contact zone increases the interface area between NiAl and AlMg6.

Novel hydrophobic Ti-PVDF energetic thin films with excellent mechanical and ignition properties and their reaction mechanisms

With the development of traditional aluminum(Al)-based nanothermites, some problems on account of the metal Al powder gradually emerged. Therefore, extensive research is devoted to exploring novel metal fuels to achieve better energy release effects. Titanium (Ti) powder is a potential metal fuel theoretically considering of reducibility and calorific value, but it has rarely been reported in the field of nanothermites. This paper put forward the design strategy by selecting as the metal fuel and polyvinylidene fluoride (PVDF) as oxidant. According to the hydrophilicity of Ti powders, the PVDF film encapsulation can effectively improve hydrophobicity and storage stability. Another advantage of PVDF film state is that it imparts excellent mechanical properties (yield strength of 30.5 MPa and elongation at break of 202.8 %). According to the results of thermal analysis, Ti increased the thermal stability of PVDF while accelerated its thermal decomposition rate. In ignition properties, Ti-PVDF films have the shortest ignition delay time (217 ms) lower than results reported in the literature of other nanothermites under the same conditions. In addition, the energy release process of ignition combustion is analyzed and verified in this paper. Therefore, Ti-PVDF energetic ignition material with diverse properties is expected to be applied in more fields not limited to nanothermites.

Microstructural Modification of Cold-Sprayed Ti-Cr3C2 Composite Coating by Laser Remelting

Laser processing is an effective post-treatment method for modifying the structure and improving the properties of cold-sprayed coatings. In the present work, the possibility of fabricating a hard and wear-resistant Ti-based cermet coating by cold spray followed by laser remelting was studied. A mixture of titanium and chromium carbide powders in a ratio of 60/40 wt.% was deposited by cold spray onto a titanium alloy substrate, which ensured the formation of a composite coating with a residual chromium carbide content of about 12–13 wt.%. The optimal values of laser beam power (2 kW) and scanning speed (75 mm/s) leading to the qualitative fusion of the coating with the substrate with minimal porosity and absence of defects were revealed. The microstructure and phase composition of as-sprayed and remelted coatings were examined with SEM, EDS and XRD analysis. It was shown that the phase composition of the as-sprayed coating did not change compared to the feedstock mixture, while the remelted coating was transformed into a β-Ti(Cr) solid solution with uniformly distributed nonstoichiometric TiCx particles. Due to the change in microstructure and phase composition, the remelted coating was characterized by an attractive combination of higher microhardness (437 HV0.1) and lower specific wear rate (0.25 × 10−3 mm3/N × m) under dry sliding wear conditions compared to the as-sprayed coating and substrate. Laser remelting of the coating resulted in a change in the dominant wear mechanism from oxidative–abrasive to oxidative–adhesive with delamination.

Optimization of In Situ Formation of a Titanium Carbide Nanohybrid via Mechanical Alloying Using Stearic Acid and Carbon Nanotubes as Carbon Sources

The current work shows the optimization of the preparation of nanosized titanium carbide in situ through mechanical alloying. Metallic titanium powders, along with two carbon sources, carbon nanotubes, and stearic acid, were used to reduce the particle size (around 11 nm) using an SPEX 800 high-energy mill. The combined use of 2 wt % of these carbon sources and n-heptane as a liquid process control agent proved crucial in generating nanoscale powder composites through a simple and scalable synthesis process within a 4 h timeframe. The uses of 20 wt % of both carbon sources were compared to determine the ability of carbon nanotubes to form carbides and the decomposition of process control agent during mechanical milling. The structure of the composites and starting materials were evaluated through X-ray diffraction and Raman spectroscopy, while the morphology features (average particle size and shape) were monitored via scanning electron microscopy and transmission electron microscopy.

Mechanical Properties Enhancement of AZ91 Magnesium Alloy Reinforced with Various Ratios of Titanium Particles and Processed by ECAP

This study utilized AZ91 magnesium-aluminum alloy as the matrix for magnesium-based composites, reinforced with micron-sized titanium (Ti). Gravity casting and mechanical stirring were employed to fabricate specimens with 0 wt.%, 0.3 wt.%, and 0.5 wt.% Ti reinforcement. Heat-treated samples underwent Equal Channel Angular Pressing (ECAP), and microstructures were analyzed via SEM and XRD. The experimental results demonstrate that the addition of micron-sized titanium improves the yield strength, ultimate tensile strength, and hardness. The inclusion of 0.5 wt.% titanium powder resulted in a 17.5% increase in ultimate tensile strength and a 37% increase in yield strength. After secondary processing with ECAP, the ultimate tensile strength showed an additional 25% increase, while the yield strength increased by 13.5%. Vickers hardness test results reveal a significant 13.7% strength improvement with the addition of 0.5 wt.% titanium powder, and after ECAP secondary processing, there was a marginal additional increase of 0.8%.

Formulating titanium powder feedstocks for metal injection moulding from a clean binder system

Impurity control is paramount in achieving success in titanium metal injection moulding (Ti-MIM), primarily due to Ti being a universal solvent for interstitial elements such as oxygen and carbon. This study developed a clean binder system with a low decomposition temperature based on polypropylene carbonate/polyoxymethylene (PPC/POM). However, due to the poor shape retention of the PPC/POM binder system, polyethylene glycol (PEG) was incorporated to facilitate the formation of a porous network within the compact structure, allowing efficient removal of residual binder for subsequent debinding process. The results reveal that increasing the PEG content leads to a higher binder removal rate, while adding POM enhances shape retention during debinding. The optimal PEG/PPC/POM binder system compositions were identified as 40/48/10% w/w, respectively, offering a higher PEG removal rate and improved shape retention. Lastly, the resultant debound titanium feedstock from this novel binder system showed low impurity contents, complying with ASTM F2989 requirements.

Synthesis of bioactive heat cured PMMA/PEKK blend reinforced by nano titanium dioxide for bone scaffold applications

In bone tissue engineering (BTE), defects in large bones remain the greatest issue which can be addressed using bone scaffolds. In this work, blends of heat cured polymethylmethacrylate (HC PMMA) and various weight percentages of poly-ether-ketone-ketone (PEKK) (0, 2, 4, 8, and 10%) were made using a porogen leaching process. The blends were then subjected to tensile, compression and bending tests to select the optimum blend. Based on the results obtained, HC PMMA blended with 2 wt% PEKK was selected to produce the bio-porous blends. Here, the porosity was imparted using tartaric acid (C4H6O6) and sodium hydrogen carbonate (NaHCO3) as porogen leaching components. Porous blends resulted were then reinforced with a nano titanium dioxide powder (nTiO2) at different weight percentages of (0, 1, 3, and 5). The results showed that porous composites made of (HC PMMA: 2 wt% PEKK) blend reinforced with 5 wt % nTiO2 exhibit the highest strength values under various loadings.The FTIR identified the functional groups of the bone scaffold components. The mean pore size and pore depth were measured using atomic force microscopy (AFM) analysis and the values are 92.6 nm and 42.78 nm, respectively. The good distribution of the PEKK and nTiO2 within the HC PMMA and the uniform porous structure with multi-scale pores between 535 nm and 1.187 mm were confirmed by the AFM data and SEM images, respectively. This research expected that the porous composite (HC PMMA: 2% PEKK: 5% nTiO2) is a good candidate for bone scaffold applications.

Phase composition tuning by high-energy ball milling of titanium dioxide powders

In this work, titanium dioxide was modified by high-energy ball milling using jars and grinding balls made of high-strength ceramics, namely, zirconium dioxide ZrO2, stabilized with yttrium oxide Y2O3, and the stability of anatase and rutile nanopowders under high mechanical load was studied. The examined nanopowders were certified by a complex of physical methods, such as XRD, BET, SEM, TEM, XPS, diffuse light scattering, and Raman spectroscopy. Analysis of the obtained experimental data showed that ball milling of TiO2 (rutile, sp.gr. P42/mnm) decreased the size of CSR particles to 20 nm and increased the specific surface area from 8 to 36 m2/g. Milling of TiO2 (anatase, sp.gr. I41/amd) resulted in phase transformations and the formation of several titanium dioxide phases, namely, a high-pressure phase TiO2-II (columbite, sp.gr. Pbcn), TiO2-B (bronze, sp.gr. C2/m) and TiO2 (rutile, sp.gr. P42/mnm); in addition, the average size of CSR particles decreased to 8 nm and the specific surface area increased from 8 to 45 m 2/g. It was established that during ball milling, defects were introduced into the system and the concentration of Ti3+ ions changes, which was confirmed by XPS, TEM, and Raman spectroscopy data; these ions have a positive impact on the photosorption properties of the material. Besides, milling increased the number of grain boundaries and interfaces, which enhanced the surface energy of the powder, adsorption properties and stability of catalysts.

Investigation of the Microstructure of Porous Tube-Shaped Elements Made of Ti-Powder Materials

The method of powder metallurgy for the manufacture of titanium products has the advantages of low cost of raw titanium, short technological process, low energy consumption, and less equipment investments. This allows to significantly reduce the total costs. The method is a potential technology to manufacture inexpensive products from titanium alloys. Due to its high strength, low specific weight and high corrosion resistance, titanium is widely used in aerospace and automotive industries and biomedicine. Among various applications of titanium, tube- and disc-shaped products from titanium powder are essential. The paper presents the results on the investigation of products made of titanium powder by the method of magneto-pulse pressing. Titanium powders with a particle size of 160-1000 mm produced by grinding titanium sponge and its powder compositions were used in the investigation. Investigation results on microstructure and porosity are also discussed. The mean porosity of the samples after sintering was 25-28% for products of 4-6 mm thick. With increasing thickness, the porosity increases to 35% and more, while it was non-uniform both over the cross-section of a tube-shaped product and along its length. The outer surface of the product was found to have a looser microstructure. This can be explained by the application of an intermediate fusible layer to the inner wall of the shell, which makes easier the removal of the shall after pressing. The studies generally confirm the possibility tof using the magneto-pulse pressing of titanium powders in shells to manufacturesmall product batches.

Synthesis, characterization of Ca (OH)2: TiO2 nanocomposite and evaluation of its antimicrobial efficacy

Introduction and Aim: Root canal treatment is a dental operation that entails the extraction of the compromised tooth pulp tissue, sterilization of the root canal system, and subsequent filling with an inert substance. To mitigate the potential for bacterial infections and subsequent difficulties, it is customary for patients to receive a prescription for antibiotics prior to undergoing a root canal procedure. The objective of this study was to assess the effectiveness of Ca(OH)2: TiO2 nanoparticles as a potential substitute for antibiotics in root canal therapies, while also investigating their antibacterial properties against specific infections. Materials and Methods: Ca (OH)2: TiO2 nanoparticles were synthesized chemically using calcium hydroxide and varying concentrations of titanium oxide powder by a sol-gel process. The Ca (OH)2: TiO2 nanoparticles synthesized was characterized using Field Emission Scanning Electron Microscope (FE-SEM), energy dispersive X-ray (EDX), Fourier Transform Infrared Spectrometer (FT-IR), and UV-Vis spectrophotometry. The antibacterial activity of the synthesized nanoparticles was evaluated against pathogens Escherichia coli, Staphylococcus aureus, and Candida albicans spp.) by gel diffusion method. Results: FE-SEM analysis indicated that the Ca (OH)2: TiO2 composite material exhibited an amorphous structure, characterized by a particle size measuring 25.88 nm. But FTIR was focused on the spectral region between 4000 and 450 cm-1. The absorption spectra of nanoparticles composed of titanium dioxide consistently displayed a prominent peak at a wavelength of 300 nm. The results of the experiment pertaining to the biological effects of composites suggest that the inclusion of TiO2 nanoparticles at concentrations of 25%, 50%, and 75% in the composite material led to a notably wider inhibitory zone in comparison to the use of Ca(OH)2 alone, with a statistically significant p-value of 0.05. Conclusion: The use of varying concentrations of Ca (OH)2TiO2 improves microbial activity against Escherichia coli, Staphylococcus, and Candida.