Abstract: In order to prepare wear-resistant titanium-based coating, a Ti-Al-N wear-resistant titanium-based coating was prepared on TC4 surface by laser cladding. The phase composition, microstructure evolution and hardness of the coating under different laser powers were observed and analyzed, and then the tribological properties of the composite coating in the air environment were analyzed. The results show that the strengthening phase of the coating is mainly composed of Ti₂AlN, TiN, TiAl and Ti_xAll_y. The diffraction peak intensity of each phase changes with the increase of laser power, and the matrix phase is composed of (γ-TiAl+α₂-Ti₃Al). The coating is metallurgically bonded to the substrate. With the increase of laser power, the microstructure gradually changes from dispersed columnar crystals to coarse dendrites, but when the laser power was 2.4 kW, the microstructure becomes fine again. The microhardness of the composite coating can reach 2.14 times that of the substrate. In the air friction environment, different samples are mainly abrasive wear, and the matrix wear is serious. The coatings under different laser powers greatly improve the wear resistance of the substrate. The minimum wear rate of the coating was 0.786×10^-4 mm³· N^-1·min^-1, and the matrix was 1.34×10^-4 mm³·N^-1·min^-1. Therefore, the coating performance can be adjusted by controlling the laser power, which provides basic support for the application of laser cladding high wear-resistant titanium-based composite coatings in aerospace and marine equipment.