Abstract:To address quality issues such as cracking and earing during the thermal deep drawing of TC4 titanium alloy cylindrical parts, an ultrasonic vibration-assisted forming method was proposed. The effects of ultrasonic vibration on the thermal performance and high-temperature interfacial friction behavior of TC4 titanium alloy were studied by ultrasonic vibration-assisted tensile and sliding friction experiments. By analyzing the drawing force, surface quality, wall thickness distribution, and earing morphology of the fixed-dimension blank under different temperature conditions, the influence of ultrasonic vibration on the forming process and forming quality of TC4 cylindrical part was clarified. Finally, through variable-dimension limit drawing experiments under different temperature conditions, the limit drawing coefficient and the effective height of the TC4 cylindrical part assisted by ultrasonic vibration were obtained. The research findings indicate that applying ultrasonic vibration during the thermal deep drawing of TC4 cylindrical parts can not only effectively reduce the drawing force and earing ratio, but also improve the uniformity of wall thickness distribution, significantly enhancing the limiting drawing ratio and effective height of the drawn specimens.