To address the challenge of determining the process parameter sensitivity in friction stir processing (FSP) of SiC/Al composites, this study investigated the influence of travel speed on the microstructure and mechanical properties of a25 wt.% SiC+1.5 wt.% TiO2+1 vol.% CNT/Al-1 wt.% Cu composite, aiming to provide a theoretical basis for optimizing the manufacturing process of brake discs. The base material was fabricated via powder metallurgy, and single-pass FSP was subsequently conducted using travel speeds of 50 mm/min (sample FSP50) and 100 mm/min (sample FSP100). Through microstructural characterization and tensile testing, a systematic analysis was conducted to evaluate the influence of travel speed on the microstructure and tensile properties at both room temperature and 300 ℃ .The results indicate that FSP promotes a homogeneous distribution of SiC particles through the combined effects of shear and rheological flow; the thermomechanical coupling during FSP effectively refines the Al3Ti and Al2Cu particles, and the grain size decreases with increasing FSP travel speed. FSP100 exhibits an enhancement in room-temperature tensile strength, reaching 407 MPa, which is attributed to increased grain boundary strengthening and improved microstructural homogeneity; at 300 ℃ ,the composite strength decreases due to matrix softening and interfacial degradation. The fine SiC particle-Al interfaces introduced by FSP are more susceptible to debonding under high-temperature conditions.