The filling and solidification process of titanium alloy melt in graphite mold was investigated in vertical centrifugal field and in gravity field, respectively. The results show that the process in the former is better than that in the later. The flowability and the filling ability of the melt in the centrifugal field are much improved, it is especially favorable for producing the castings with 3 mm thin wall. The mold can not be fully filled by the melt in the gravity field, in such case the filing resistance is larger than filling force. The full filling can be realized in the centrifugal field. By which the minimum wall thickness of a casting can reach 0.3 mm In addition, under the common action of Coriolis force and centrifugal force, the defects of titanium alloy casting decreases with increasing of rotational velocity