Online non-oxidation heat treatment method for beta titanium alloy wire

The invention discloses an online non-oxidation heat treatment method for a beta titanium alloy wire, which relates to a titanium alloy processing method and comprises the following steps: performing cold treatment on beta titanium alloy; performing surface pretreatment; and performing heat preservation for 3-10min under controlling the temperature of a protective tube-type furnace to be within a temperature range which is 0-100 DEG C higher than the phase transformation point of the alloy in an Ar (argon) atmosphere protection environment to finally obtain the bright beta titanium alloy wire with low deformation resistance and high deformability. The method is suitable for any beta titanium alloys. For example, the alloy contains 14.0-16.0 percent of vanadium, 2.5-3.5 percent of chromium, 2.5-3.5 percent of stannum, 2.5-3.5 percent of aluminum and the balance titanium by weight. Excellent mechanical properties that the tensile strength is 780MPa, the yield strength is 730MPa, the elongation is 21.5 percent a