Fyre Theme modification

Hi,

I’m building a website based on the Fyre theme. I’m trying to modify the titles of the sections (Portfolio items Our latest portfolio items and Blog Posts Our latest blog posts) or even remove the text completely but cannot figure out how to do that. The theme’s customization options do not allow for that so I’m guessing they are somewhere in the php files?

I’m new to this so any help will be appreciated. The website is olaadrian.com.

Many thanks

Anna