The paper aims to generate a wearable second phase structure by titanium element and copper base alloy to improve the friction performance of copper-based alloy in brine. A titanium modified copper-based coating was fabricated on ZQAl9442 copper alloy via laser cladding. SEM, EDS, XRD and friction and wear tester were used to analyze the microstructure, element distribution, hardness and friction performance of the modified coating. The AlCu2Ti phase was generated due to the addition of titanium element in the modified coating, which improved the surface hardness of the modified coating under the action of the second phase precipitation strengthening. The microhardness of the modified coating was up to (310±10)HV0.3, 14.8% higher than that of the homogeneous repair layer. The friction coefficient of the modified coating in brine was much lower than that of the NAB coating. The wear mechanism of modified coating in atmospheric environment was oxidation wear, adhesive wear and abrasive wear, while the wear mechanism in seawater environment was abrasive wear. Through laser cladding on the surface of ZQAl9442 copper alloy, the titanium-modified copper-base modified coating with high hardness, high wear resistance and resistance to marine environment friction was obtained, which can improve the service life of copper alloy in marine environment to some extent.