Medical beta-titanium alloy powder material used for 3D printing and preparation method thereof

The invention discloses a medical beta-titanium alloy powder material used for 3D printing and a preparation method thereof. The beta-titanium alloy molecular formula is Ti25Nb10Ta1ZrxR, and the medical beta-titanium alloy powder material is composed of, by weight, 25% of Nb, 10% of Ta, 1% of Zr, and the balance Ti, wherein R represents rear earth, the value range of x is 0.05-0.1, R is at least one of Y, La, Ce and Er, and Ta represents Ti20Ta alloy. The titanium alloy powder material is prepared through electrode induction smelting gas atomization, that is, metal liquid subjected to medium-frequency induction smelting and refining is cast into a grinding tool to obtain a metal cast rod, and the metal cast rod serves as a consumable electrode of electrode induction gas atomization; and then the powder material is prepared through an electrode induction atomization method. The high-strength low-modulus powder material Ti25Nb10Ta1Zr0.1R prepared through the method is high in purity, high in sphericity degree a