In order to develop a new biomaterial with higher wear resistance and fracture toughness, titanium and partially-stabilized zirconia (PSZ) composite was sintered by spark plasma sintering (SPS) method. Various types of titanium/zirconia composite with different mass fraction of zirconia were prepared by sintering at 1173K and 1373K. In order to discuss their capability for biomaterials as a slide member, micro-Vickers hardness tests, reciprocating wear tests, and fracture toughness measurements were carried out. The micro structures of composites were characterized by a scanning electron microscope (SEM), an energy dispersive X-ray spectrometer (EDS) and an X-ray diffractometer (XRD). The composites sintered at relatively lower temperature of 1173K with small mass fraction of zirconia showed higher wear resistance and fracture toughness as compared to the composites with large zirconia mass fraction. This was because the former composites included titanium and zirconia mixed area mainly composed of TiO and Ti2ZrO inside the specimen. These compounds improved the hardness and wear resistance of composites. Higher hardness and wear resistant composites were achieved by sintering at 1373K with large mass fraction of zirconia. However, these composites showed lower value of fracture toughness because of the higher volume fraction of TiO and Ti 2ZrO. These results imply that addition of small mass fraction of zirconia is effective in improving a mechanical property of composites. Biocompatibility of sintered composites was also discussed.