Burning wood is a process where the moisture is sucked out of the fibre and, if done correctly, the wood will be strengthened. Fire and heat can be used to straighten arrows, as well as harden the tips. Using fire to harden the tips of wooden arrows makes it possible to use the arrows without an arrowhead. In scenarios where materials to make sharp arrowheads are scarce, this process could be necessary for survival.
Build a small, hot fire using dry wood. The drier the wood is, the hotter the fire will burn.
Wait until the flames have died down and the coals are glowing orange.
Take one of the arrows and place the tip over the hot coals. Maintain a safe distance so the arrow does not catch fire. To make sure the heat distribution is even, rotate the arrow over the coals, removing it often to check for charring or burning.
Remove the arrow from the heat and tap the tip against a rock. If it feels sturdy, set aside to cool.
Do not allow the arrow to become overly scorched or burnt. This will weaken the structural integrity of the arrow.