Motivated by the attractive predictions cf potential strength in creases achievable through texture control, an investigation of the mechanical anisotropy of titanium sheet alloys was carried out. This ex perimental survey of the uniaxial tension anisotropic characteristics was executed on a wide variety of alpha, alpha-beta, and beta alloys of both recent and ancient vintage. It was clearly demonstrated that both the elastic and plastic properties were widely varying in anisotropy. Furthermore, it was found that there was a direct correlation between the elastic and plastic anisotropy. Although considerable variation of anisotropy existed for one alloy, there was a tendency for the all-alpha alloys to be highly resistant to thinning. It was also found that increased amounts of beta stabilizing elements present in the alloy had a tendency to lower this resistance to thinning. An explanation of the alloying effect is suggested from the results of a preliminary study of changing anisotropy with rolling temperature. Several sheets were tested in order to deter mine the variation of mechanical anisotropy with specimen orientation. Three distinct types were found. Finally, through, the comparison of longitudinal and transverse anisotropy parameters and yield strengths, it was determined that Hill's theory of yielding for anisotropic metals was invalidated.
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