There is no theoretical way to accurately calculate the properties of an alloy, you can only make an estimate. So it can be said that Ti6Al4V and Ti7Al5V have fairly similar properties. In order to get accurate mechanical properties, the alloy has to be manufactured in reality and tested on testing machines.
A combination of literature research and experimental testing is typically necessary to determine the mechanical properties of a material with a different composition. Tensile testing can provide valuable information on properties such as yield strength, ultimate tensile strength, and elongation at break, while hardness and toughness testing can provide additional insights into the material's behavior under different loading conditions.
When the composition of a material is changed, its mechanical properties can also change. To determine the mechanical properties of a composition-changed material, the following steps can be followed:
1. Identify the new composition of the material and the specific alloy or material system it belongs to.
2. Gather information on the mechanical properties of the base material and other related materials with similar composition. This can include data from published literature, material property databases, or material testing laboratories.
3. Conduct material testing on the composition-changed material to determine its mechanical properties. The testing can include tensile testing, compression testing, bending testing, or any other relevant mechanical testing methods.
4. Analyze the data obtained from the material testing and compare it with the data available for the base material and related materials. This will help identify any changes in mechanical properties due to the composition change.
5. Use statistical analysis and modeling techniques to predict the mechanical properties of the composition-changed material. This can be done by building regression models that relate the mechanical properties to the composition of the material.
6. Verify the predicted mechanical properties of the composition-changed material by conducting further material testing and comparing the results with the predicted values.
Overall, determining the mechanical properties of a composition-changed material requires a combination of experimental testing, data analysis, and modeling techniques. It is important to gather as much data as possible on the base material and related materials, as well as to conduct thorough testing and analysis of the composition-changed material to accurately predict its mechanical properties.
I guess what you want to know is the mechanical properties of the alpha + beta Titanium alloys when it undergoes thermomechanical deformation/treatment. The best bet is to do a literature review of works done on the alloys. The alloys' mechanical properties will give a perfect insight into what the mechanical properties of the alloys could be at any treatment/deformation temperature range.