Erosion wear properties of pressureless sintered TiC/Al2O3 composites were measured by a collision test between Al2O3 or SiC particles accelerated in an air stream for the purpose of the comparison with various pressurized sintered ceramics composites, SiC, Si3N4, ZrO2, Al2O3 monolithic ceramics, and cemented carbides. In the case of collision by Al2O3 particles, the pressureless sintered TiC/Al2O3 composites had the highest wear resistance, which wear rate was almost the same as that of commercial pressurized sintered ceramics composite. On the other hand, in the case of collision by SiC particles, cemented carbides (WC+4Co) had the highest wear resistance. The wear rate of pressureless sintered TiC/Al2O3 composites was smaller than that of Al2O3, SiC and ZrO2/Al2O3 composites; however, it was almost the same as that of commercial pressurized sintered ceramics composites, Si3N4 and ZrO2.