Hi @bjones
There are a few hack ways. I have seen people using Google Tag Manager to generate Unique Title & Meta Description. Check out this Moz blog.
If you’re worried about content duplication; you can also define the rule in robots.txt. I don’t know how much these archived pages link help in SEO; but if you don’t need it, you can simply disallow it in robots.txt (you can edit the robots.txt file directly in HubSpot).
User-agent: *
Disallow: */archive
This will block the Google Bot from indexing your blog archive page, thus no duplication issue. 