Abstract: Ti doped Cu-1.0wt% Y₂O₃ composite powder was prepared by mechanical alloying. Cu-1.0wt% Y₂O₃ composites with different Ti content（0.2wt%, 0.4wt%, 0.6wt%） were prepared by spark plasma sintering（SPS）. The thermal processing of the sintered samples was carried out, the process parameters were hot rolled at 800℃with deformation amount of 10%, then quenching at 800℃ for 30 min, and cold rolling with deformation amount of 50%, finally, aging at 450 ℃ for 4 h. The results show that when the Cu-1.0wt%Y₂O₃-xwt% Ti composite powder is treated by high-energy ball milling, the dendritic copper powder is converted to layered sheet copper powder, the Y, Ti and O elements are uniformly distributed,and the particle size of the powder is smaller than that of the undoped Ti powder. With the increase of Ti content, the grains of the sintered composite materials are gradually refined, the microhardness increases significantly, and the conductivity gradually decreases. The density, hardness and electrical conductivity of Cu-1.0wt%Y₂O₃-0.6wt% Ti composite are 91.9%, 93.7 HV and 51.9% IACS, respectively. After thermal processing, the electrical conductivity, hardness and density of the composite are all improved, and a large number of dimples appear on the fracture of the composite. Y₂O₃ particles are in the center of the large-sized dimples, and small dimples are distributed in the composite matrix.