In order to solve the problem of failure of 45 steel parts such as bearings, gears, connecting rods, etc. under the action of alternating loads in a high temperature and high pressure environment, Ti+SiC composite coating were fabricated by laser cladding Ti and SiC powder on the surface of 45 steel. By changing the laser power, scanning speed and other process parameters during the laser cladding process, this paper investigates the general law of the influence of technological parameters on the structural evolution, microstructure and surface properties of the anticorrosive coating. Results indicated that the coatings were comprised of Ti5Si3, TiC, TiSi, Fe2C, Fe2SiTi, Fe, and Ti phases. The complex in situ formed phases were found beneficial to the improvement of the coating property, especially the surface wear resistance of TiC relative deposited coating improved significantly. Compared with 45 steel, the wear resistance of the composite coating surface of sample 3 increased to more than 36.64 times and the microhardness also showed significant improvement (5.54 times). Therefore, it can be known that with the increasing of laser specifific energy (from 4.5 kJ/cm2 to 5.8 kJ/cm2), the TiC phase was easier to be formed, and the comprehensive properties of Ti-based composite coatings have been improved. While too high laser specific energy will inhibit the formation of TiC phase and thus decrease the wear resistance, laser specific energy should be limited to a certain range.