Formation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"> <mml:mrow> <mml:mo>{</mml:mo> <mml:mn>11</mml:mn> <mml:mover accent="true"> <mml:mn>2</mml:mn> <mml:mo>¯</mml:mo> </mml:mover> <mml:mn>2</mml:mn> <mml:mo>}</mml:mo> </mml:mrow> </mml:math> contraction twins in titanium through reversible martensitic phase transformation

Amir Hassan Zahiri, Jamie Ombogo, Lei Cao