Thanks, I'm not familiar with that discussion, so maybe this has all been covered before. Typically, the "proper" manufacturing process would be to anneal, shape and weld, and then heat treat.
Of course, you have to work withing your capabilities. The heat treatment process is slow but not that difficult. If @Fluxor wants to advance his capability I'd recommend getting an oven if the volume justifies it, or seeing if there's anyone local who can
I have annealed t6 to bend things with the wrong dies because that’s all we had and needed to build and test fit something.
The material cools extremely quick and as it cools it takes more tonnage to move. It can make getting repeatable bend angles very difficult.
Bending T6 with the suitable radius die and a mechanical connection to a replaceable rash guard seems like the sweet spot.
There is another issue regarding the forces at play. The rash guard wraps around the bottom edge of the bumper. They come close enough to the main tube crossmember to help with larger vertical drops where the weight slams down on that lower edge.
