Use per-page title with a Jekyll theme

This is just the way this theme is implemented, if you check the default layout for Cayman theme on line 14 you can see what exact variable it is using.

<h1 class="project-name">{{ site.title | default: site.github.repository_name }}</h1>

Hope that helps!

Update: I have since submitted a pull request to change this in the theme, and the answer below is no longer necessary since it's already been applied when you use the theme as of now. All you need to do is to specify the title override in the front matter:

---
title: My custom title
---

---

To specify another title, you need to change the layout file.

Copy the default layout and place it in <GitHub repo>/_layouts/default.html, and change line 16 to this:

<h1 class="project-name">{{ page.title | default: site.title }}</h1>

Then Jekyll will respect the title set in the front matter, and place it there.