5. Softening treatments
In fact, this term can cover several treatments, depending on the objective. If the aim is simply to relieve stresses without any significant loss of mechanical properties, the problem boils down to choosing a judicious time-temperature compromise.
On the contrary, if maximum softening is sought, the aim is to return to structural equilibrium, usually by annealing, sometimes by over-annealing.
5.1 Stress relief
The manufacture of titanium alloy parts (machining, welding, etc.), as well as the heat treatment itself (rapid quenching), can generate residual stresses that lead to deformation in service.
An annealing treatment would be an effective remedy, but may prove impossible (degradation of dimensional characteristics...
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Softening treatments
Treatments to specifically enhance certain working properties
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