Abstract: The consumable electrode was prepared by adding the black skin on surface of the titanium ingot to the sponge titanium, and the ingot of φ140 mm was obtained by one time of vacuum consumable arc remelting（VAR）. The components of black skin on titanium surface and the head and tail of the ingot, the microstructure and room temperature mechanical properties of the ingot were investigated by using ICP spectrometer, oxygen hydrogen carbon sulfur analyzer, scanning electron microscopy and tensile test machine. The qualitative relationship between adding black skin on titanium alloy surface and chemical composition of ingot was studied. The results show that the O element content of the black skin on the surface of titanium ingot is as high as 10.84%, and the oxygen content of the Ti ingot without black skin addition is 0.069%-0.071%,which is in line with VAR law of increasing oxygen. The oxygen content of the Ti ingot melted with black skin is 0.20%-0.21%, which is 2.8-3.2 times of that of the ingot without black skin. The chemical composition is evenly distributed, and no obvious metallurgical defects are observed during the macrostructure inspection. The average tensile strength and yield strength of titanium ingot at room temperature is 530 MPa and 497 MPa, respectively, and the elongation after fracture is 14%,and the match of strength and ductility level is basically equivalent to the mechanical properties of industrial pure titanium.