I got some golf clubs from a thrift store, had the heads removed. Then I shoved the graphite driver into the steel shaft from one of the irons, these happen to fit together so well I can't get them apart. From REI, I got a set of trekking pole carbide tips, they got pressed onto the bottom of the steel shaft. All of this fit together so well that there is no rattling, and I cannot get any of it to come apart.
That hiking pole has been everywhere with me for over 10 years. I've beat on trees, whacked tree limbs out of my way, thrown it like a spear, dropped it down a small cliff, it just can't be hurt.
With each step, the pole contacts the ground and has some lateral spring for shock absorbtion, and it's lightweight makes it a pleasure to use.
Anyway, that's my "trekking pole". Cost me less than $20 to make.