High-strength titanium bronze alloy strip and preparation method thereof

The invention provides a high-strength titanium bronze alloy strip and a preparation method thereof, and relates to the technical field of copper alloys. The high-strength titanium bronze alloy strip provided by the invention comprises the following components in percentage by mass: 2.5%-4.5% of Ti, 0.05%-3.0% of Sn, 0.02%-0.5% of Mg, 0.06%-0.5% of Fe, 0.015%-0.1% of rare earth elements and the balance of copper and inevitable impurities, the rare earth element comprises at least one of La or Y; in the high-strength titanium bronze alloy strip, the grain size of copper matrix grains does not exceed 10.8 microns. The tensile strength of the strip is larger than or equal to 1000 MPa, the percentage elongation after fracture is larger than or equal to 8%, the electric conductivity is larger than or equal to 15% IACS, 180-degree bending is achieved, no crack exists, and the strip can meet key components used in the fields of high-end electronic communication, aerospace and the like. 本发明提供了一种高强钛青铜合金带材及其制备方法，涉及铜合金技