TiO2 powders with rutile and brookite phases were synthesized through homogeneous precipitation of the aqueous TiOCl2 solution, prepared from TiCl4 and HCl solution, and their properties were characterized. Based on the analytical results appropriate molar ratios of Cl-total : Ti+4 in precipitating solution for synthesis of pure rutile phase and a mixture of rutile and brookite phases were proposed. The volumetric proportion of brookite increased with increasing HCl concentration under a typical condition obtaining mixed phase of rutile and brookite. The brookite phase in the mixture was transformed to anatase phase by heat treatment at about 800 ℃~850 ℃, and finally converted to rutile phase at was transformed to anatase phase by heat treatment at about 800 ℃~850 ℃, and finally converted to rutile phase at 1000 ℃.