On the deformation texture of square-shaped deep-drawing commercially pure Ti sheet

The effect of crystallographic texture on the deformation behavior of commercially pure titanium (c.p. Ti) sheet in dual-temperature square-shaped deep-drawing process has been investigated. The thickness strain measurement shows that the increase in drawing temperature improves the drawability of c.p. Ti. The orientation distribution functions (ODFs) by X-ray texture analysis show that the c.p. Ti in a sheet form has the pronounced {0 0 0 2} basal type normal direction (ND)-fiber, which show strong {h k i l}//ND-fiber textures with four types of complete ND-fiber with (0 0 0 2), (1̄ 2 1̄ 5), (1̄ 2 1̄ 2), (0 2 2̄ 1) orientations and two types of partial ND-fiber of (3̄ 6 3̄ 1) and (0 1 1̄ 3). It is noted that the orientation densities of the predominant ND-fibers (0 0 0 2), (1̄ 2 1̄ 5) and (3̄ 6 3̄ 1) are proportionate to the drawing heights of c.p. Ti cups, but the others are less correlated. The enhancement of (1̄ 2 1̄ 5) 〈1 0 1̄ 0〉 texture component indicates that a better drawability is due to the easier metal flow. Besides, at high temperature the orientation density of (1̄ 2 1̄ 0) [0 0 0 1] texture component reveals that the active deformation behavior along c-axis could lead to a complex (c+a)-axis gliding. In summary, the complex active slip systems of c.p. Ti sheet intensify the ND-fiber textures during dual-temperature condition, thus result in better drawability of c.p. Ti sheets, which could further confirm the dominant effect of crystallographic texture on deformation behavior that results in a microshear band microstructure.