isaacwedin

This plugin automatically creates a title for posts that do not have one. If the post contains text, the title is set to the first few characters of the post. For posts without any text content, the title is set to a configurable untitled post string.
<h3>Credits</h3>
This plugin is based on ideas from the Prologue theme and Luke’s Default Post Title plugin.

Titlematic

Automatically generates a title for posts without a title.

thaikolja

Secondary Title is a simple, light-weight plugin that adds an alternative title to posts, pages, and/or <a href="https://codex.wordpress.org/Post_Types" rel="nofollow ugc">custom post types</a>, which can be displayed automatically, with a shortcode or by using PHP.
The plugin comes with an extra settings page, which allows you to customize the plugin according to your needs. You can change:
<ul>
<li><a href="https://codex.wordpress.org/Post_Types" rel="nofollow ugc">post types</a>, categories, and specific post IDs the secondary title will be 
shown on,</li>
<li>whether the secondary title should be automatically added to the standard title (Auto show),</li>
<li>the format both titles are being shown (only works when Auto show is activated),</li>
<li>the position where the secondary title input field should be displayed (above or below the standard title) within the admin interface (Classic Editor only),</li>
<li>whether the secondary title should only be displayed in the main post and not within widgets, etc.,</li>
<li>if the secondary title should be usable in <a href="https://codex.wordpress.org/Using_Permalinks" rel="nofollow ugc">permalinks</a>,</li>
<li>and even more.</li>
</ul>
Please see the <a href="https://docs.kolja-nolte.com/secondary-title/" rel="nofollow ugc">official website</a> for a full documentation.

Secondary Title

Earlier I marked it one star as everything had stopped working due to the error generated by the plugin. Turned out it was not due to the plugin but the malware attacked the admin area.

I am taking my words back and apologizing to the author of the plugin. As a developer myself I can feel his pain. Therefore I am reviewing my comment and updating it.

Once again, this is a great plugin for writing SEO based headings.

Works as expected


First off, this is great, it works very well, I'm super happy with it.



I did NOT however want to delve into making custom templates, what I wanted was to treat the subtitle field like the excerpt.  So I went to ChatGPT and said "make a wordpress plugin that replaces the content of the except with the content of a meta field"The only thing I had to change was the name of the field, which is _secondary_title.  I'd love to see this as an option in the plugin, the code is only about 10 lines.


I enchanced with ChatGPT

Secondary Title is a simple, lightweight plugin that allows you to easily add an alternative title to posts, pages, and/or custom post types.

Titlematic vs Secondary Title