I make folding knives with a liner-locking mechanism, which locks the blade open so it will not accidentally close when in use.  All my knives now have hidden hardware, so they do not have screws visible on the outside of the knife; including the thumb stud.  Each folder has a minimum of 18 hidden screws holding everything together.  Very few makers in the world use this technique.

Blade Materials
My preferred blade materials are stainless damascus or hi-carbon damascus, and CPM 154 stainless steel.

I generally use a matching material for the bolsters and backspacers. I filework the backspacer and liners on almost every knife.  The locking liners are made of titanium.

Handle Materials
Popular materials are bone, stag horn, buffalo horn, and stabilized woods such as burlwoods.  Some of the wood varieties I have used are: ironwood, snake wood, California buckeye burl, ebony, fossilized wood, cocobolo, zebra wood, and bocote, to name a few of the most common.

The stabilization process is done by a method of injecting the wood with a plastic solution under high vacuum pressure and then heating it so it polymerizes.  The resulting product is very stable and resists dimensional change.  While stabilized wood does not have the exotic reputation as some other natural materials, it is very durable and makes a great knife handle.