<p>As a new type of material, high entropy alloys (HEAs) have attracted significant attention in the materials field due to their advantages of high strength and wear resistance. In this study, in-situ synthesized TiC-reinforced AlCoCrFeNiTiC_x (x = 0.0, 0.5, 1.0, 1.5, 2.0, 2.5 wt%) HEA composite coatings were fabricated on H13 steel substrates via laser cladding. The influence of graphite (C) incorporating on the phase composition and microstructural evolution of the composite coatings was investigated. Microstructural characterization revealed that the coatings primarily consist of body-centered cubic (BCC) and face-centered cubic (FCC) phases, with the in-situ formation of TiC precipitates upon C doping. Notably, increasing the C content induced a morphological transition in TiC crystals from cellular to columnar structures. Mechanical property assessments demonstrated that the coating with 1.0 wt% C exhibited optimal performance, achieving an average microhardness of 835 HV_0.2, 10% enhancement over the undoped HEA matrix and 2.5 times that of the substrate. Tribological evaluations indicated a significant improvement in wear resistance, with wear rates of 5.18 × 10⁻⁵ mm³·N⁻¹·m⁻¹ at room temperature and 1.09 × 10⁻⁴ mm³·N⁻¹·m⁻¹ at 600&#xa0;°C, respectively. The wear mechanism at room temperature and high-temperature was mainly composed of abrasive wear and oxidative wear. The enhanced mechanical and tribological properties were attributed to the in-situ precipitation of TiC phases, which contributed to dispersion strengthening.</p>