α+β TYPE TITANIUM ALLOY SHEET WITH EXCELLENT COLD ROLLING PROPERTIES AND COLD HANDLING PROPERTIES, AND PRODUCTION METHOD THEREFOR

摘要

An alpha+beta type hot-rolled titanium alloy sheet, wherein: (a) ND represents the normal direction of a hot-rolled sheet; RD represents the hot rolling direction; TD represents the hot rolling width direction; theta represents the angle formed between the orientation of c axis and the ND; phi represents the angle formed between a plane including the orientation of the c axis and the ND, and a plane including the ND and the TD; (b1) XND represents the highest (0002) relative intensity of the X-ray reflection caused by crystal grains when theta is from 0° to 30° and phi is within the entire circumference; (b2) XTD represents the highest (0002) relative intensity of the X-ray reflection caused by crystal grains when theta is from 80° to 100° and phi is ±10°. (c) The alpha+beta type titanium alloy sheet has a value for XTD/TND of at least 5.0.