I have used the ti lock in the work shop with wood dust, building a sand box, gardening and even a few days wet/dry cutting concrete. I noticed that with the concrete dust and moisture it made the movement a bit gritty and one day some nasty fine grain mud did the same. However the grit I felt was actually the lock bar moving along the track of the blade and that is where it would seize up a bit. Due to the design of the bearings, the inner portion is basically sealed off from the elements and anything that you may feel can be blown or washed out from between the blade and bearing race. Large grain sand never did much to it. It actualy kept its smoothness far longer than most other knives I have owned.
The blade just had its first cleaning since May/june by taking it down. The inside of the bearing assembly was totally clean and had origional lube even after washing it with soap and water a few dozen times over the months. I found that running it basically dry or just lightly lubed/dry on the blade side kept great action. I will admit I admire this gift and I clean it every few days with a bit of alchohol or soap and water as it makes a great paring knife as well for fruit and small veggies. I bet I could have waited another six months with just an occasional water bath and the knife would still operate smoothly. It was actually smoother before I cleaned it up than it is now. The knife might have a few little quirks, but if you keep it clean and maintain it. The design just functions perfect all day every day. Anything I am worried about would be taken care of by my mora. The beneftis of the design far outweigh any small flaws it may have. I will have a spair blade with lock bar installed someday just to have an extra. I will be keeping this puppy to pass down to family.
One self inflicted wound was last week actually. I somehow managed to toss it about 10 feet onto the pavement and it dinged up the titanium track a hair and left a burr that the lock bar would snag and roll over when opening. I took a crock stick to it and smoothed it out.