The aim of the work is to increase the life of end mills when processing parts made of ductile metals, such as titanium alloy VT6 (equivalent to Ti-6Al-4V). The method of experimental design and manufacture of cutting tools, which is widely used in industrial production, is characterized by high labor intensity in creating effective samples. Theoretical and experimental studies of the proposed calculation technique have been performed for conditions of purposeful shape change of the rake surface of the cutting edge. The developed computational and analytical model of the cutting scheme takes into account inclination angle of the cutting edge and determines the possibility of determining the effective value of the rake angle and the cutting force during milling. The required solution is based on the energy balance equation. It is assumed that the power of the energy consumed during milling is spent on plastic deformation of the processed metal in the shear plane, on overcoming friction forces along the front and rear surfaces of the milling cutter teeth and on the destruction of the processed metal associated with the formation of new surfaces in the cutting plane. A software information technology complex for designing integral end mills has been developed. The use of a computerized calculation method has significantly reduced the complexity of development work to create an effective working tool. The results of comparative tests of the milling cutter prototypes showed an increase in the durability period of the working tool by 15% when processing a VT6 titanium alloy ledge.