Titanium alloys are used in both engines and airframes in the aerospace industry. The new aircrafts use more titanium fraction compared to the previous generations. Properties of titanium alloys (tensile, ductility, fatigue, fracture toughness compromise) are related to microstructure achieved through thermomechanical processing. Process development of forged parts has to be cost effective and in shorter lead time. Thus process modeling is today commonly used in engineering department in order to define material flow and processing windows (temperature, deformation, ...) to produce reliable forgings. The presentation will show the basis of modeling and the effect several thermomechanical treatments on Ti64 (Ti-6Al-4V) on tensile properties and microstructures.