Fatigue-creep interaction test was carried out on Ti60 alloy specimen at 550℃. Under the test conditions of fatigue stress ?max=450MPa and stress ratio R=0.1, the influence of different creep stress on fatigue-creep behavior of titanium alloy was studied. According to the test data and based on the Norton model, a new method was proposed which can be used to improve the fatigue-creep behavior of titanium alloy with limited samples. A prediction model that predicts the threshold value of creep stress over a longer period of time only through a short period of testing. The prediction results of this model are compared with those of the maximum axial stress method and those of the lifting method. The relative error is less than 2%. The results show that the prediction model can accurately predict the creep stress threshold under the fatigue-creep test conditions.