<p>In this study, TiB₂/AlSi₁₀Mg composites are fabricated by laser metal deposition (LMD), and the effects of TiB₂ content on microstructure and mechanical properties during additive manufacturing are investigated. After LMD processing, as the content of TiB₂ continues to increase, the TiB₂ particles remain essentially in their original form, reducing the laser reflectivity and increasing melt temperature, which leads to a slight increase in grain size. The incorporation of TiB₂ particles effectively hinders the movement of dislocations through the synergistic effects of Orowan strengthening, dispersion strengthening and thermal mismatch strengthening, enhancing the deformation resistance of the material. The experimental results showed that the properties of TiB₂/AlSi₁₀Mg composites were significantly improved compared to unreinforced AlSi₁₀Mg. The best comprehensive performance of the composites was obtained when the TiB₂ content was 6%, with tensile strength, yield strength, elongation and hardness of 230&#xa0;MPa, 145&#xa0;MPa, 7.59% and 97.33 HV, respectively, which were improved by 27.8%, 29.5%, 46.5% and 23.5%, respectively, compared with unreinforced AlSi₁₀Mg. Additionally, wear performance has been greatly improved, with a notable shift in the mechanism from adhesive wear to abrasive wear.</p>