You can not bend it unless it is T-1 or T-0 temper. Even then, if it is older than about a year, it is likely aged to a higher temper which will fracture when bent. Under normal storage conditions, a T0 material will migrate past a T-1 condition in about one year.
If it IS T-1 or T-0, then bend it as usual with an interior radius of maybe 1.5-2X the thickness - you will be fine.
I should continue by saying that this is relative to most of the popular alloys, including 6061, 6063, 5013 and 2000 series. Most of your thicker sections are structural, therefore are likely 6061-t5 which can not be bent. You can cut it and weld it but you will not get it bent. The structural stuff is ALL at least T5 - it has to be special ordered from the mill to get a T-0 or T-1 for bending applications. 6063 is extruded and has similar constraints.