How can I bend aluminium curtain track?

I have a bay window where the side windows are at 90 degrees from the main front window. I have bought an aluminium curtain track which apparently can be bent to fit the bay.

Has anyone got any tips on how to safely and controllably bend the track at the two points I need to bend it?
Damien, January 2014
Just bend it gently in a radius over your knee,don't try to make it a right-angle.

Rich t, January 2014