You are able to enter a seemingly infinite title for a KB article. However, there seems to be some functionality stopping this from being published as when publish is clicked the page refreshes and nothing happens. No error message is displayed to notify you that your title is too long, and you must arbitrarily guess at where to truncate it. (Note that it will still auto save happily and stay in draft)
A good solution would be to provide an error message if the title character length is too long.
A better one would be to stop the entry of more characters if the limit is reached.