I worked in the pipe and steel bending trade from 1981 to 2000 in the engineering department. We were able to bend all sorts of structural steel as well as pipe and tubing made from steel, aluminum, stainless steel, Incoloy, Inconel, Hastelloy, etc. Each material had its own idiosyncrasies of what it would tolerate. Aluminum age hardens very quickly. When bending aluminum, we'd have to buy it directly from the mill, because if it spent any time laying on the racks at a supplier, chances are it would crack when bending. These handlebars have had plenty of time to age harden, and any attempt at bending it back into shape it would be an exercise in futility.