Preparation method of titanium and titanium alloy wires or powder for 3D printing

The invention discloses a preparation method of titanium and titanium alloy wires or powder for 3D printing. The method comprises the steps that titanium or titanium alloy billets are selected; and the titanium or titanium alloy billets are smashed, then smelted repeatedly and stretched to obtain a titanium or titanium alloy wire finished product, or a powder atomization method is adopted to obtain a titanium or titanium alloy powder finished product. By means of the preparation method of the titanium and titanium alloy wires or powder for 3D printing, the prepared materials have the beneficial effects of being small in density and heat conduction coefficient, high in specific strength, resistant to corrosion and high temperature, free of poisonousness and magnetism, high in tensile strength and the like, and therefore the method is applicable to the field of 3D metal printing, and particularly suitable for the technical field of medicines, aerospace and the like having the strict requirements for 3D printing materials.