In this study, surface hybrid composites reinforced with TiC and MoS 2 were fabricated on anneal and T 6 7075 aluminum substrate via friction stir processing (FSP). For this purpose, reinforcement particles were added to the 7075 aluminum matrix using groove technique, afterward friction stir process was applied. The optimal parameters used for friction stir process were as following: rotational speed of 1600 rpm, linear speed of 25 mm/min and deviation angel of 3°. Samples without reinforcement particles, samples reinforced with TiC, and hyprid composites samples with 5 vol% of reinforcement were prepared. friction stir process was applied on each sample using two and three passes. effects of friction stir processes on microstructure, hardness and tribological behavior of 7075 aluminum alloy with and without reinforcement particles were studied. The microstructural investigations showed that using friction stir process on based alloy would significantly decrease the grain size of stir zone. The grain size of based alloy was decreased from 127 µm in anneal state and 280 µm in T 6 state to 8 µm in stir zone. Moreover, effects of number of passes on distribution of reinforcement particles, hardness and wear behavior of Al7075/TiC and Al7075/TiC/MoS 2 surface hybrid composites were studied. The results showed a better distribution of reinforcement particles in the matrix using three FSP passes along with the change in the direction of tool rotation. In addition, with increasing number of passes from two to three, the hardness of samples was increased. The best wear resistant was observed in sample prepared with three passes, using different tool rotation. Furthermore, the hardness of surface hybrid composites was improved in stir zone in comparison with based alloy; however its hardness was decreased slightly in comparison with Al7075/TiC surface composite. Because of the existence of MoS 2 reinforcement particles as solid lubricant, wear resistance of Al7075/TiC/MoS 2 surface hybrid composite was significantly improved in comparison with Al/TiC composite samples. In addition, studying the surface of wear particles of surface hybrid composites showed that abrasive wear mechanism is the dominant mechanism.