Low-cost free-cutting antibacterial titanium alloy and preparation method of titanium alloy faucet

The invention discloses a low-cost free-cutting antibacterial titanium alloy and a preparation method of a titanium alloy faucet. The low-cost free-cutting antibacterial titanium alloy comprises the following chemical components in percentage by mass: 10.0 to 12.0 percent of Al, 6.0 to 10.0 percent of Fe, 1.0 to 3.0 percent of Mn, 0.1 to 0.5 percent of Mo, 4.0 to 6.0 percent of Cu, 0.5 to 1.0 percent of Bi, 0.6 to 1.5 percent of Sn, less than or equal to 0.05 percent of C, less than or equal to 0.015 percent of H, less than or equal to 0.05 percent of N, less than or equal to 0.2 percent of 0 and the balance of Ti and inevitable impurities. The titanium alloy is prepared into a consumable electrode, and the titanium alloy faucet is prepared from the melt in a negative pressure casting mode. Compared with ZTiAl6V4, the cost of the obtained titanium alloy faucet can be reduced by 20-30%, the corrosion resistance of the titanium alloy is reserved, and the effects of antibiosis, free cutting and the like are achi