Custom fields are perfectly suited for this purpose. WP Ref. IF the metabox titled Custom Fields is not visible on your post edit screen, you may need to enable the view with the Screen Options menu at the top right of your editor.
For each post, simply create the secondary title and assign it a value.
Where you would like this information to display, (front-page.php template, based on your example) you are able to make use of pre-built WP functions such as the_meta() or get_post_meta() for output.
The meta_key is the name for your secondary title and meta_value is the actual title itself.
This method is useful for additional information you may also wish to input with each news post.
If you prefer a plugin over custom coding, I would recommend Elliot Condon’s Advanced Custom Fields. This plug-in brings powerful features to non-developers with very little overhead. WP plugin directory link