Monosized titania particles (10-12mum) prepared by H2O2 oxidation of metallic Ti in an ammonia solution were found to be porous agglomerates of 30mum X 10mum sticklike structure unites which consisted of much finer particles. The sintering behavior of compacts consisted of agglomerates was evaluated in comparison with that of an acicular rutile particle compacts. The anisotropy grain growth has been interpreted as being due to the sticklike hard agglomeration which determines the growth direction of grains.