In the present research work, silicon nitride (Si3N4) and graphite (Gr) ceramic powders are ball milled to obtain homogeneous mixing and consistent density of combined powder. The ball-milled powder is used as reinforcement for hybrid composite development by stir casting process in the inert atmosphere. After mixing by ball milling for 100 hours, the density of ball-milled (Si3N4 + Gr) powder is measured as 2.81 g/cm3, which is approximately equal to the density of aluminum (2.7 g/cm3). The microstructures and hardness of the manufactured hybrid composites are analyzed and compared with Si3N4- and Gr-reinforced composites. Scanning electron micrograph reveals a reasonably uniform dispersion of ball-milled (Si3N4 + Gr) reinforcement in the metal matrix composites. Hardness results reveal that hybrid composites have more hardness than Gr-reinforced and lower hardness than Si3N4-reinforced composites. The dry sliding wear behavior of aluminum matrix hybrid composites has also been investigated. Response surface methodology is used to develop wear model of hybrid composites using reinforcement percentage (R), load (L), sliding speed (S), and sliding distance (D) as the process parameters. The results of wear investigation show that increase in sliding speed (S) and percentage reinforcement (R) reduce the wear, while increase in sliding distance (D) or load (L) increases the wear of the hybrid composites. Further, the load-sliding distance and load-sliding speed interactions increase the wear, while the wear reduces due to sliding speed-sliding distance interaction in the high range. The errors between the modeled and experimental results are found within 3 to 7 pct.