I know I’ve seen the answer to this before, but had a hard time tracking it down, so thought it worthwhile to post.

To change the web page’s HTML title (or any other head information) for a web component, create a method updateRoot: .  This method will be call when the component is rendered on the page - remember to always super the call too.

component>>updateRoot: anHtmlRoot
    super updateRoot: anHtmlRoot.
    anHtmlRoot title: ‘fooTitle’.
    “do anything else you’d like to Root here too”