Can slow cooling achieve fully annealed grade 2 Ti foils?

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Achieving fully annealed grade 2 titanium foils after stamping is challenging, particularly when ductility decreases post-vacuum annealing. The current process involves vacuum annealing at 700°C for 2 hours, but it may not effectively relieve stress. A suggested improvement includes a two-step heating approach: first anneal, then heat to 550-575°C for 15-30 minutes before cooling. Slow cooling is also emphasized as crucial for stress relief. Adjusting these parameters could enhance the ductility of the titanium foils.
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Hello, I'm having a hard time stamping and annealing grade 2 Ti foils (0.0125mm thickness). The ductility appears to decrease significantly after I vacuum anneal the Ti foil after stamping. I'm running them at a vacuum of 10-6, 700 deg C for 2 hrs and I seem to be making them worse than if I don't anneal them at all. I'm looking for a fully annealed part after stamping. Any ideas on how I can achieve this?
 
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It sounds like you are annealing, but not stress relieving. Any heating up can add stress to the material. 700C @ 2 hr, is correct for annealing, then cool, then heat to 550-575C (1000-1100F) for 15-30min, then re-cool. This will help relieve stress, you have to do similar processes in steel. Feel free to double check my math, our ovens are in F.
 
Are you allowing it to cool down slowly?
 

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