Yes it does, and HN suggests the title element as the default when submitting a link. However, most blogging products add extra stuff like the name of the blog for SEO purposes. If you look at the post itself, the title is simply "Tall and Narrow."

HN shows you the doman (tbray.org) next to the title, so there is no need to also have the title incude Tim's name or the name of his blog.

So my suggestion is to override the default, as we are not search engine bots. I contend this makes the titles easier to read and parse for humans. JM2C, of course.