That it's a server for some kind of wiki seems fairly clear from the title, and I'm not sure what much more relevant context you could fit in a title - i.e. it

That it's a server for some kind of wiki seems fairly clear from the title, and I'm not sure what much more relevant context you could fit in a title - i.e. it can't really explain much more about TiddlyWiki with just a few words? There's two of the words you complain about in it: the name of the project itself, and TiddlyWiki - which is clear that it's a wiki, and naming it explicitly instead of just referencing a generic wiki is useful for everyone who is aware of it.