In order to reduce the risk of expensive tool failure in the machining of Titanium alloys, the paper presents a tool life prediction approach based on the analysis of cutting forces. Regression analysis was applied to develop the prediction model. Detailed steps of implementation are presented. Prediction logics and criteria are introduced. Cutting tests were carried out to validate the reliability of the proposed method. When compared with empirical methods the proposed approach which is based on the analysis of cutting force measured in the machining process appears far more effective in predicting tool life.