For the development of a lightweight, high-strength, and oxidation-resistant steel matrix composite, titanium carbide (TiC) reinforced SUS431 metal matrix composites (MMCs) were proposed in this study. TiC-SUS431 composite, which is 25.5% lighter than SUS431, was successfully fabricated by a liquid pressing infiltration (LPI) process. The TiC particles are homogenously distributed in the SUS431 matrix without apparent pores or impurities. Effect of TiC particle size on the anti-oxidation properties of the composites was also investigated in the research. The mass gain of the tested TiC(1 mu m)-SUS431 composite, held at 700 degrees C for 50 h in an air environment, decreased by about 90% compared to that of the TiC(3 mu m)-SUS431 composite, which indicates improved oxidation resistance originating from the formation of a thermally stable thin Ti oxides on the composite.