Slightly bent canes may not look as pretty as straight ones, but you can use them for a long time. They weigh less than aluminum canes, and more than the next two hollow canes. Solid fiberglass will take quite a bend and still straighten. If they are bent past a certain point, they will split into long splinters which are dangerous to touch. The cane will probably get you home in that condition, but beware the splinters.
Hollow fiberglass is lightweight and very easy to handle.
It has a nice bounce to it, but will only take a moderate bend without breaking. That is, it may not withstand tripping someone. When it breaks, hollow fiberglass tends to crush and fall apart very soon. Carbon fiber canes are fairly stiff and have only a little bounce. They are light weight and easy to handle.