Ideally the H1 should not be your page title. In case you did not edit it manually perhaps some app did.
You can change the page title to a SEO friendly following this tutorial though.
Even though it's about removing the shop name from the title its code is quite SEO-friendly and will serve to fix your title.
@Diego Thanks for a quick reply. I will need some more understanding of this. E.g., the name of my products in the Title field and my collections' names, should they not appear as H1 in search results?