With a good finish, the paint is not going to chip on most titanium frames and the core is not going to corrode, either. This makes maintenance a bit easier but it still might be a good idea to perform some from time to time. In specific, you should clean a titanium frame a few times a season. All you need to achieve this is mild soap and warm water, really. Then, with a soft cloth, go ahead and fully dry it. And, to finish, you can invest in some bike wax to polish the titanium.