Abstract: Uranium-titanium alloy fragments are characterized by high density and impressive penetration capability. Based on the fire gun driving platform, five kinds of typical fragments with titanium content of 0.5%~1.0% were tested with the fragments penetrating into target of A3 steel plate to study penetration features of uranium-titanium alloy fragments. The terminal ballistic characteristics of uranium-titanium alloy fragments penetrating steel target were obtained. And mass, velocity and kinetic energy changes of different recipes after fragments penetration were studied in the experiments. The experiments show that bright light is produced as main penetrator hitting target. Damage form of steel plates mainly is plugging and combines with ductility penetration. Furthermore, fragment of titanium content of 5% has the minimum loss of kinetic energy. Fragment of titanium content of 0.75% can cause most serious shear damage.