Effect of extension <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.gif" overflow="scroll"><mml:mfenced open="{" close="}" separators=","><mml:mrow><mml:mn>10</mml:mn><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo stretchy="true">-</mml:mo></mml:mover><mml:mn>2</mml:mn></mml:mrow></mml:mfenced></mml:math> twins on texture evolution at elevated temperature deformation accompanied by dynamic recrystallization