<p>High-entropy alloys based on the FeCrCoNi system, known for their single FCC phase, have attracted significant interest owing to their outstanding ductility across a wide temperature range, including both cryogenic and ambient conditions. However, the low yield strength limits its potential for industrial applications. In this paper, the fabrication of Fe55Cr25Co10Ni10 high-entropy alloy composites containing different amounts of TiB₂ by the laser melting deposition technique is presented. This study examines how TiB₂ influences the phase composition, microstructural evolution, mechanical performance, and tribological behavior of the material. Phase and microstructure analysis results indicate that increasing TiB₂ content transforms the high-entropy alloy from a single FCC solid solution structure to a composite phase structure composed of FCC, the boride of Cr, and TiB₂. Meanwhile, the microstructure changes from coarse columnar crystals to a coexistence of columnar dendrites and cellular dendrites. Mechanical testing and friction and wear properties show that the improvement in yield strength, hardness, and wear resistance is mainly attributed to the combined strengthening effects of Hall–Petch strengthening, dislocation strengthening, diffusion strengthening, load transfer effect, and the boride of Cr. It demonstrates that incorporating ceramics into the matrix enhances strength, making it well-suited for future development in high-performance aerospace components.</p>