Abstract: In order to enhance the surface corrosion resistance of the AZ31 magnesium alloy, the defect-free Al-TiC composite coatings were prepared on AZ31 magnesium alloy using laser cladding technology. The influences of Al-TiC compositions with different contents on the phase composition, microstructure and corrosion resistance of the Al-TiC composite coatings were investigated. The results indicate that a large number of Al₁₂Mg₁₇, Mg₂Al₃ and TiC phases are produced in the Al-TiC composite coating. The microstructure of the composite coating characterizes as a continuous network distribution. With the decrease of the Al content in the composite powder, the contents of the Al₁₂Mg₁₇, Mg₂Al₃ and TiC phases in the composite coating gradually increase, and the network-like distribution characteristics of the microstructure in the composite coating become more uniform and continuous. In addition, a sound metallurgical bonding interface is prepared between the composite coating and the AZ31 substrate. The corrosion resistance of the Al-TiC composite coating prepared using the laser cladding technology is significantly enhanced compared to that of the AZ31 substrate. The self-corrosion potential increased from −1.563 V of the AZ31 substrate to −1.144 V of the Al-TiC composite coating, whereas the self-corrosion current decreased from 1.55×10⁻⁴ A to 2.63×10⁻⁶ A.