Titanium alloy castings are obtained with different rotation time in the ISM apparatus. The effects of rotation radius, riser and rotation time on the tensile strength, yield strength, specific elongation, and microhardness are investigated. The results show that the mechanical properties increase with the increase of rotation radius for the same rotation time. Excellent mechanical properties can be obtained for the casting with riser. As the rotation time is increased from 1.5 min to 15 min, the mechanical properties are greatly improved due to the finer microstructure and the strengthened grain boundary and then resulting in the increase of the resistance to dislocation slipping.