One other thing you can do is to kerf the tip, that way you are bending two slats half as thin. Once it is bent, you glue them back together, possibly inserting a thin wedge of wood to stiffen the tip.
The metal band is to hold down splinters on the belly side. It provides support for the wood and helps get a smooth bend as opposed to the wood "kinking" at one spot. People usually make a wooden jig, so the back rides along a piece of wood and the belly has the metal strap holding it together.