<p>This study employed A356 aluminum alloy as the matrix and 10 vol.% SiC particles as reinforcement to fabricate SiCp/A356 composites via the stir-casting method. The effects of stirring speed, stirring temperature, and stirring time on particle distribution, interfacial microstructure, as well as mechanical and wear-resistance properties were systematically investigated. The experimental results demonstrate that the stirring parameters play a critical role in regulating the uniformity of SiC particle dispersion, the formation of pore defects, and interfacial reactions. Excessively low stirring speeds lead to particle agglomeration, whereas excessively high speeds promote porosity formation and the generation of detrimental interfacial phases. An appropriate stirring temperature improves melt fluidity and facilitates beneficial interfacial reactions; at 725 °C, a stable interfacial layer dominated by MgAl₂O₄/MgO forms, effectively suppressing the formation of Al₄C₃. Increasing the stirring time enhances particle deagglomeration; however, excessive stirring results in oxide inclusions and secondary agglomeration. Comprehensive analysis indicates that optimal composite properties are achieved at a stirring speed of 300 r/min, a stirring temperature of 725 °C, and a stirring time of 30 min. These findings provide theoretical insight and practical guidance for process optimization and engineering applications in the fabrication of high-performance SiCp/A356 composites using the stir-casting method.</p>