Recently, hybrid organic–inorganic nanocomposite UV-cured coatings have received considerable attention. Their attractiveness is due to improvements in various properties, including resistance to scratch, abrasion, heat, radiation as well as other mechanical and electrical properties, while maintaining their transparency and gloss. In this research, TiO2-pigmented and unpigmented epoxy acrylate/SiO2 nanocomposites were prepared and their curing behavior and mechanical properties were evaluated. For this purpose, photo-DSC and DMA were used. The extent of SiO2 content in samples was chosen in the range of 0–3 h−1. The results showed that the ultimate conversion values increased by 14.1 and 17.6 % when 1- and 3-h−1 silica nanoparticles were added to unpigmented formulation, respectively. On the other hand, the final conversion of TiO2-pigmented formulations increased by 31.7 and 57.1 % using 1- and 3-h−1 silica nanoparticles in the formulations, respectively. These results revealed that the incorporation of silica nanoparticles into pigmented formulations had a more considerable effect comparing to the unpigmented ones. The elastic modulus of unpigmented cured films which had 1- and 3-h−1 silica nanoparticles increased by 21.4 and 23.8 %, respectively, in comparison with the neat sample. The effect of silica nanoparticles on the elastic modulus of pigmented cured films was more considerable, and it increased by 28 and 52 % in comparison with the neat sample when 1- and 3-h−1 silica nanoparticles were incorporated into the formulation. The Tg of nanocomposite samples was found to be higher than that for the neat samples. Once again, it was more significant for the pigmented formulations.