After multiple range sessions and around 10 rounds, the black finish on my T200s and SM9 Wedges still look good. the only damage I have is scratches on the bottom of my SM9 Black 60. Hit a ball out of the bunker and hit the underlying gravel. Other than that incident, The Black Ti Oxide is holding up.

I only use damp cloths during and after rounds. After rounds may include a little dishwashing soap added and the solution works well to clean balls

If your courses tend to have sandy soil, you will get additional wear due to abrasion. Wiping the face off after each shot may help.

Titleist recommends under their "Customer Service - Warranty, Care and Repair"

Cleaning and Care for Titleist Golf Clubs

Titleist drivers, woods, hybrids, irons and wedges can be cleaned with mild soap and water and then dried with a soft cotton cloth. We recommend your golf clubs and headcover be completely dry before storage. Storing golf clubs in wet headcovers can lead to rust and corrosion and may not be covered by the warranty.

The best thing is to wipe them off during play with a damp towel. Keep the clubs clean and keep sand off of them. They should be fine. This new finish is supposed to be more durable, but if you use them enough, I would expect some wear.