Abstract
TiO2 was HIPped at 1100,1200,1300°C under 50,200MPa. Grain sizes in the HIPped TiO2 were measured. The effect of HIPping pressure on the grain growth was discussed. As the results, in the initial stage of sintering, HIPping pressure promoted grain growth. But in the final stage of sintering, HIPping pressure suppressed grain growth.