Well you don't necessarily "bend wood" per say. You can, but takes a ton of work and the right equipment.
All it is regular 1/4" ply wood which can form to a certain radii. If you can get 1/8" plywood, a little better. But this thick of plywood has its difficulties such as the studs outlined/showing through, problems getting nails/staples to stay, glue can penetrate through, warping, etc. If you want a tighter radius to "form" the wood, you simply cut notches into the plywood height wise, 1"-1.5" apart, half way through the ply wood, along the entire sheet you are going to form. This will allow you to "bend" the plywood to just about any radius. This is the common method in wood building and in construction. Hope this helps.