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The distribution characteristics of in-grain misorientation axes (IGMA) in cold-rolled pure titanium were investigated using electron backscatter diffraction (EBSD). Depending on the orientation of individual grains, two distinct IGMA distribution patterns were observed: one with strong intensities of IGMA around h0001i and the other with those around huvt0i. Analyses based on the Taylor axes and Schmid factors of possible slip modes suggested that the former pattern arises from predominant activation of prism hai slip, while activation of f11 " 22gh " 1 " 123i slip under the suppression of prism hai slip results in the latter pattern. It was also found that prism hai slip becomes more active with increasing strain, playing a critical role in the plasticity of pure titanium. The present work demonstrates that IGMA analysis of EBSD data may be used to explore the active slip mode in polycrystalline hexagonal-close-packed (hcp) metals deformed to moderate to large strains.

Based on analysis of texture and in-grain misorientation axes (IGMA) distribution, we investigate the effects of initial orientation and deformation temperature on the rollability of magnesium alloy AZ31 and the associated deformation mechanisms. Plate samples oriented favorably for basal hai slip exhibited the best rollability at room temperature, whereas under the warm-rolling condition, surprisingly, the plate oriented for prism hai slip exhibited the best rollability. The enhanced rollability of the latter plate is attributed to increased activity of prism hai slip, which exhibits a lower texture hardening rate than basal hai slip. The increased activity of prism hai slip is shown experimentally by the development of the h10 " 10i//RD texture and h0001i-type IGMA distribution. Asymmetric texture is also suggested to impair the rollability of plate oriented for basal hai slip.

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