Abstract: B₄C/Al composites are difficult-to-machine materials consisting of an aluminum matrix reinforced with hard boron carbide (B₄C) particles. Single-factor milling experiments were conducted to investigate their machining characteristics, systematically examining the effects of feed per tooth, axial depth of cut, and spindle speed on milling force, temperature, surface roughness, chip morphology, and tool wear. The results revealed distinct trends. A higher feed per tooth reduced cutting temperature and improved surface finish but increased mechanical impact, leading to coating flaking. An increased axial depth of cut significantly raised both cutting force and temperature, which promoted material adhesion and deteriorated surface quality. Conversely, a higher spindle speed reduced cutting force and produced a better surface finish; however, it also resulted in a substantial increase in cutting temperature, thereby accelerating tool wear.