.

[fullmoon6661]

.

[jpanhalt]

1100 is quite soft and has a recommended "minimum" bend radius .  Anything sharper may lead to cracking.  There are tables, such as this: https://www.aircraftmaterials.com/data/aluminium/1100.html 

Minimum bend depends on alloy, heat treatment, and thickness.   Minimum (not optimal) bend radius is often quoted relative to thickness.  Harder allows will have a radius of 6T or more (T= thickness).

Simply look up your alloy and any heat treatment. 1100 is often temper-0, so there is no practical minimum radius for 1/16" thickness (0.064") according to that table.