Titanium is a stable and firm metal. So you don't need to pay a lot of attention to it, it's hard to have problems, and the maintenance cost is low. Having said that, though, there are still people who will ask the question of how titanium bracelets will turn the skin green.
Don't worry about this aspect, even if you are sensitive to metals. Titanium is hypoallergenic. You will know that many medical treatments are made of titanium materials, and it turns green because your skin reacts with the metal. Titanium will not react with your skin, so it will not Make your skin green.
Will that tarnish or discolor? Normally it does not tarnish and discolor, but some people report that his titanium bracelet is tarnished and discolored because his titanium bracelet is gold-plated jewelry. Any gold-plated jewelry will inevitably lose its luster and color, no matter what color you have plated (gold, rose gold, white). If you want to solve it, the best way is to choose to re-gold, you can go to the jeweler to gild. This may cost extra money though. But this is a must if you want to maintain beautiful colors.
Overall, titanium is simple to maintain based on its properties. All you need is dish soap and warm water to clean your titanium bracelet. If you are looking for jewelry that won't change color, titanium jewelry is a good choice.