Monodispersed $Al_2O_3-TiO_2$ Powder was prepared by metal-alkoxide hydrolsis. A homogeneous nucleation/growth occurred in the solutions containing ethanol, butanol and acetonitrile, and resulted in spherical, submicrometer-sized powder. The titania and the alumina crystals were formed at $800^{circ}C$ and $1000^{circ}C$, respectively. These crystala were subsequently reacted each other beyond $1320^{circ}C$ and formed $Al_2TiO_5$. The relative densities of sintered bodies prepared with as-received powder were examined at the temperature range of 1300-$1500^{circ}C$ and they were about 79% at $1300^{circ}C$. The formation of aluminum titanata decreased the relative density at the temperature range of 1300-$1450^{circ}C$, and at above $1450^{circ}C$, the relative density started to increase again. It was observed that $alpha-Al_2O_3$-doped aluminum titanate was more stable than pure aluminum titante at $1200^{circ}C$.