Everyone else who has replied has given you good advice as to changing the title.
A thing to bear in mind though if you are attempting to increase search engine visibillity is that search engines use the URL as a key part of the search. Don't change the titletoo much if it means it moves away from the URL.
If you change the title to have little relevance to the URL the search engines may just ignore the hub completely.Because they think you are just keyword loading or the hub has no relevance.
If you need to change the title so much that this may happen, consider re-writing the hub with a new URL. You can even keep the old hub as a long standing link back and make it clear that the new hub is revised in the light of new information. So you in effect have two hubs for the price of one.