本发明公开了一种获取钛合金拉伸试验规定总延伸率的计算方法，属于材料力学技术领域。包括：建立钛合金拉伸试验应力应变R—e曲线模型；利用胡克定律拟合出关于常系数弹性模量的斜率公式；根据规定塑性延伸率的平行偏置线，计算偏置线斜率表达公式；基于平行线同位角相等定理，计算延伸率Δe表达公式；基于计算的延伸率Δe表达式和规定塑性延伸率，计算规定总延伸率；验证屈服强度相等或最接近；本发明效果是：提供了一种获取钛合金拉伸试验规定总延伸率参数的计算方法，在实际的拉伸试验应力应变曲线上可准确、真实的反映钛合金材料的规定总延伸强度，为实际生产试验和钛合金规范的制定提供理论依据，具有重要指导意义。

 The invention discloses a calculation method for obtaining a proof total elongation rate for a titanium alloy tensile test, and belongs to the technical field of material mechanics. The calculation method comprises steps of establishing a stress-strain R-e curve model for a titanium alloy tensile test; fitting a slope formula with respect to the elastic modulus as a constant coefficient by using Hooke's law; calculating an expression formula of slope of an offset line according to the parallel offset line of a proof plastic elongation rate; calculating an expression formula of an elongation rate delta e based on the theorem that corresponding angles of parallel lines are equivalent; calculating a proof total elongation rate based on the calculated expression formula of the elongation ratedelta e and the proof plastic elongation rate; and verifying that yield strengths are equal or most similar. The calculation method of the invention has effects as follows: the calculation method forobtaining a proof total elongation rate for a titanium alloy tensile test provided by the invention can accurately and truly reflect the proof total elongation strength of a titanium alloy material onan actual tensile test stress-strain curve, provides a theoretical basis for an actual production test and formulation of titanium alloy specifications, and has an important guiding significance.