<p>Ni30WC-xTiC coatings were fabricated on 45 steel by laser cladding (LC), and the effects of TiC content on the phase composition, microstructure, tribocorrosion behavior and electrochemical corrosion performance in 3.5% NaCl solution were systematically investigated. The results show that the TiC is decomposed into Ti in the Ni; while the WC is partially decarburized to form the secondary carbides such as W₂C and Cr₇C₃, which refine the structure and strengthened the WC/Ni interface, leading to the gradual increase of coating hardness with the TiC content. Under the dry-sliding wear condition, the solid-solution strengthening and hard-phase load bearing effectively suppress the micro-cutting and plastic deformation, and the wear resistance is improved by the TiC addition, and the Ni30WC-15%TiC coating exhibits the lowest coefficient of friction (COF) and wear rate. In contrast, under the tribocorrosion condition, the tribological performance of coatings is depended on the TiC content, and the Ni30WC-10%TiC coating achieved the best wear resistance by balancing the mechanical strengthening and the interfacial film stability; whereas the excessive TiC increases the defect sensitivity and facilitated chloride penetration, resulting in the performance degradation. Furthermore, the Ni30WC-10%TiC coating exhibits the lowest corrosion current density and the highest polarization and charge-transfer resistance, indicating that the appropriate TiC content improves the overall comprehensive performance of Ni30WC coatings in Cl^-containing solutions.</p>