Temperature variation model of titanium alloy L-angle profile in hot stretch forming with resistance heating

Titanium alloy profiles are excellent candidates for lots of applications, especially in aerospace field. High temperature is needed in the hot stretch-forming process because of the low plasticity of titanium alloy at room temperature. Resistance heating, with the benefit of device simplification and energy saving, is one of the most commonly used heating methods. In this paper, temperature variation model was developed for titanium alloy profile during resistance heating. The results show that the equilibrium temperature rises as the heating power increases. The temperature variation curves show that the temperature increases rapidly firstly, then keep nearly constant. Shorter heating time is needed to achieve the equilibrium temperature when higher heating power is applied. The thermal variation shows promising agreement with the experimental data, which confirms the feasibility of the developed models.