In order to modify the wear resistance of Inconel 718 superalloy, TiC reinforced Inconel 718 superalloy based composites were in-situ synthesized by co-axial powder feeding plasma melting deposition technique. Microstructure and in-situ synthesized process of the composites was analysed. The effect of volume fraction of the TiC reinforcing phase on microhardness and high temperature dry sliding wear properties of composites was discussed. The high temperature wear mechanism of the composites was studied. Results show that the microstructure of composites is refined and dense, microhardness values are remarkably influenced by the volume fraction of the TiC primary phase. The higher the volume fraction of the TiC primary phase, the higher the microhardness values of the composites. The composites showed excellent wear resistance under high temperature dry sliding wear test conditions.