Effect of Temperature on Anisotropic Behavior and Springback of Commercially Pure Titanium Foil

Commercially pure titanium (CP-Ti) foil is one of the preferred materials for lightweight metal structures. However, titanium exhibits low ductility at room temperature (RT) and necessitates warm forming to counteract this. In this paper, the effect of temperature on the mechanical behaviors of the CP-Ti foil (0.1 mm thickness) is investigated, focusing on anisotropic characteristics. To evaluate the mechanical behavior of the foil, uniaxial tensile tests are performed at RT, 100, and 200 °C. In addition, a V-bending die setup is constructed to examine the springback of the foil. The results indicate that tensile strength decreases by almost 17% in the rolling direction as temperature increases. Likewise, the elongation of the foil increases from RT to 100 °C and subsequently decreases from 100 to 200 °C. The rolled foil has anisotropic mechanical properties at RT. The highest value of average anisotropy was obtained as 2.84 at RT, whereas its lowest value was gained as 1.71 at 100 °C. The bending results demonstrate that the springback phenomenon is reduced by 77% under warm forming compared to RT.