so can I have a weapon hilt crafted from wyrwood and the weapon head made from a special material like adamantine and get both bonuses?
The root of the wyrwood tree has a peculiar quality. When a weapon constructed of wyroot confirms a critical hit, it absorbs some of the life force of the creature hit. The creature hit is unharmed and the wyroot weapon gains 1 life point. As a swift action, a wielder with a ki pool or an arcane pool can absorb 1 life point from the wyrwood weapon and convert it into either 1 ki point or 1 arcane pool point. A wyroot weapon can gain at most 1 life point per day and hold up to 1 life point at a time. More powerful wyroot weapons can gain up to 3 life points per day and hold up to 3 life points at a time. Any unspent life points dissipate at dusk. A creature can convert life points from only one wyroot weapon per day.
Wyroot can be used to construct any melee weapon made entirely of wood or with a wooden haft. Constructing a weapon that can hold 1 life point increases the cost by 1,000 gp, constructing one that can hold up to 2 life points increases the cost by 2,000 gp, and constructing one that can hold up to 3 life points increases the cost by 4,000 gp.
No.
Weapons and armor can be crafted using materials that possess innate special properties. If you make a suit of armor or weapon out of more than one special material, you get the benefit of only the most prevalent material. However, you can build a double weapon with each head made of a different special material.