Industry knowledge

Heat treatment for Ti-6Al-4V is most commonly used in the annealed condition.

Ti-6AL-4V is a general purpose alpha-beta alloy.  The ELI variant is available for fracture critical applications.  This material features moderately high tensile strength, good fatigue strength, intermediate fracture toughness, high resistnace to general corrosion in sea water, and hardenable in sections up to 1" thick.  6-4 ELI features consistent machineability.  It is stress-releived, eliminating distortion.  It's longitudinal grain flow enhances strength

 

 

When annealing it is recommended to use general purpose Mill Anneal (MA). One should be aware that this may not result in a full anneal, and there may be traces of hot, cold or warm working in heavily worked products such as sheet. Duplex anneal and triplex annealing can be used for improved creep resistance. Recrystallization anneal (RA) and beta anneal (BA) are used to improve fracture toughness. Lastly, Beta annealing should be done above the beta transus temperature.

 

Heat treatment for Ti-6Al-4V is most commonly used in the annealed condition. This is due to limited section size hardenability of the metal. For those looking to improve tensile properties we recommend performing a solution heat treatment followed by aging. Increased strength is also possible through heat treatment, however, it is gained at the expense of fracture toughness.