Are there word limits for link titles?

JOHN MEULLER (Webmaster Analyst from Google):

No as far as I know there are no limits for link titled image titles image alt text all of that there are no limits there but kind of don’t go overboard like you wouldn’t with anything else on a site make sure that it’s kind of reasonable and usable so for example one thing we sometimes see when we tell people oh h-1 headings help us to understand what the page is about then they’ll wrap the whole page in an h1 and they’ll format it make it look like normal text but they’ll say well my whole page is the most important part on the internet and that doesn’t work so just kind of try to be reasonable and do something that makes sense for the users and do something that actually provides some additional semantic value when search engines look at your pages.