Abstract
Microstructure evolution in commercial-purity titanium during plane-strain multipass rolling to a true thickness strain of 2.66 at 77 and 293K was quantified. Deformation at both temperatures was accompanied by twinning. At 77K, twinning was more extensive in terms of the fraction of twinned grains and the duration of the twinning stage. Rolling to a true thickness strain of 2.66 resulted in the formation of a microstructure with a grain/subgrain size of ∼80nm at 77K or ∼200nm at 293K. The contribution of various mechanisms to the strength of titanium following rolling at 77 and 293K was analyzed quantitatively.
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