Abstract. This study investigates Al 2 O 3 /SiCp-Al composites fabricated by pressure assisted liquidmetal infiltration techniques and modified alumina/SiC particle preforms. The infiltration has been done successfully; Examinations for microstructure, mechanical and physical properties of the composites have been fulfilled. Test results showed that the particle size was the most influential factor in decreasing mechanical properties of hybrid Al 2 O 3 /SiCp composite.