all 7075 aluminum is developed by a heat treating process called forging, which takes place at or around 700°F. It is machined in the annealed condition at 900°F for two hours using oil lubricants and then quenched in cold water.
For more details you can see the source: 7075 Aluminum by Aluminum Manufacturers
Available at: https://www.aluminummanufacturers.org/7075-aluminum/
or the following paper:
- Processing map of as-cast 7075 aluminum alloy for hot working
Guo Lianggang, Yang Shuang, Yang He, Zhang Jun
Chinese Journal of Aeronautics, Vol. 28, Issue 6, Pages 1774-1783 (2015)
Available at: https://www.sciencedirect.com/science/article/pii/S1000936115001442