In order to study the influence of cutting speed on the damage degree of sawtooth chips during the cutting process for TC4,the single factor cutting experiment of TC4 was carried out to analyze the dynamic behavior of TC4,and the finite element simulation was carried out to further explore the influencing factors of sawtooth chips and the connection between chips and cutting speed.The results show that the sawtooth of chips becomes more and more obvious as the cutting speed increases in cutting TC4 process.The numerical results show that the energy barrier of TC4 decreases with the increase of cutting speed,while the stress and strain in the adiabatic shear band increase with the increase of cutting speed.The higher the cutting speed is,the more likely it is to form sawtooth chips.