Transformation is one of the most important and pervasive themes in Taming of the Shrew. Closely related to the theme of "Art and Culture," it can involve physical disguise, changes in attitude and behavior, psychological changes, and even linguistic mutation. Unlike the kinds of transformation we're used to seeing in books (like, say, the Twilight saga – once a human turns into a vampire, she stops growing and developing and there's no turning back to her previous state), metamorphosis in Shrew is not always permanent and it's rarely genuine. To complicate matters, it's virtually impossible for us to pin down the play's attitude toward transformation – its stance toward the theme is just as slippery as the characters that undergo change. This seems to be Shakespeare's point – identity and meaning are never fixed.
Marriage incites or brings about the most dramatic and profound transformations in both men and women.
Katherine's transformation from shrew to obedient wife is not genuine or permanent.