Element of the week

So what the heck, Titanium can be my element of the week. It has 22 protons, and thus 22 electrons, it's atomic mass is 47.867 -- let's just call it 48, shall we? And it's solid at room temperature, which is good for those folks with titanium knees and titanium bikes. It's a transition metal, and I confess that I don't know what that means. Anyone want to enlighten me on that? And it's abbreviation is Ti.