Abstract: During the explosive forming of titanium-steel composite plates, defects such as incomplete fusion may occur. Currently, the accuracy, quality, and level of automation in using arc welding for repair are relatively low. The main difficulty lies in the high-quality preparation of the copper transition layer on the steel surface. In this study, a method that utilizes semiconductor laser coaxial powder feeding was proposed to accurately form the Cu transition layer, followed by TIG cladding of a Ti layer on the surface of the Cu layer to achieve localized repair of the composite plate. Using the established semiconductor laser cladding experimental system, the influences of laser power, powder feeding speed, and scanning speed on the cladding parameters and microstructure of the Cu layer were analyzed. After TIG cladding of the Ti layer on the Cu layer surface, a well-formed Ti-Cu-Fe joint was obtained through process optimization, and its microstructure was tested and evaluated for performance. The results show that: 1) The semiconductor laser can achieve precise control of the cladding thickness of the Cu layer, which ranges from 0.236 to 0.457 mm; 2) From EDS analysis of the Cu-Fe joint, it was observed that by controlling the Cu layer thickness, the content of Fe element in the upper surface region was significantly reduced, which is beneficial for reducing the brittleness of Fe-Ti intermetallic compound formation; 3) After TIG welding of the titanium layer, the joint mainly consisted of CuTi₂ intermetallic compounds, and the average shear strength of the joint was 194 MPa with a brittle fracture mode.