I don't have any bending projects going right now so I don't have any photos, but I thought I would post this because I see several projects that could benefit from bending materials. The kakivak / leister / fish spear being one.
Bending small pieces of wood: Split wood always works better than sawed wood, because sawed wood will almost always have grain runout which is where the wood will break during the bending. For green wood, split out a piece that does not have the center of the tree / limb. Carve it to rough shape and clamp to the shape you want. Green wood will not bend as far as wood that has been dried and resoaked, so only gentle curves are possible, such as the tines in the kakivak. Leave the wood in the clamp till it is completely dry. This may take weeks. Since the center is out of the wood, it is ok to apply heat source - I have hooks above my wood stove in the shop to hang things.
Cured wood should be soaked till it is waterlogged. You can tell this if the wood barely floats. For some hardwoods this may take 2 - 4 weeks of soaking for thicker pieces. Rough carve first and then soak. When wood is waterlogged, take out, boil for an hour or so and clamp in place till dry. This only may take a few days if the piece is put near a heat source.
Porous antler may be gently bent the same way, except that boiling may take all day. After it is clamped it may take weeks or even a month to completely dry and hold its new shape. The more dense the material, the longer the boil.
Horn is the hardest to bend. Mountain goat horn makes a beautiful spoon, but it may take a week of constant boiling to soften it to where it is pliable enough to form. It should be left in the form for a few weeks after you think it is dry, because it may straighten out over the next weeks if not completely cured in its new form.
These are all ancient Native methods and will all work quite well - hope it is helpful to someone. Feel free to contact if you have questions. J