Ti-based composite coating reinforced by TiC particles was prepared on the surface of TC4 alloy by means of argon arc cladding technique using the pre-alloyed powder of TiC and Ti. The microstructure of the coating was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive spectrum (EDS). Microhardness and wear resistance at room temperature of the composite coating were examined by means of microhardness tester and wear tester, respectively. The results indicate that the coating microstructure is uniform and dense, and excellent bonding exists between the coating and the TC4 alloy substrate. The coating has a great quantity of dendrite TiC and lump shaped TiC particles. The composite coating reinforced by TiC particle apparently improves surface hardness of TC4 alloy, the average microhardness can reach 9 GPa. The wear mechanism of coatings results from abrasive wear and slight adhesive wear.