Duplicate Title Tags in 3 Pages

I have a problem with my HOME PAGE. I got 3pages that shows same Title Tag ...... Changing in main HOME PAGE automatically changes all the 3pages Title Tag as one. However, the URL varies ...... So is there any way I can set 2of those pages with different Title Tags?

these pages are like -

https://www.HomePAGE.com
https://www.FeaturesPage.com
https://www.BrandsPage.com

There is guidance within includes/languages/english/meta_tags.php that helps to identify some of the main meta-tag information for a given page. Because the two other pages seem to follow the main page, would suggest creating the definitions for the other two following this pattern:

// Per-Page meta-tags. Follow this pattern for individual pages you wish to override. This is useful mainly for additional pages.
// replace "page_name" with the UPPERCASE name of your main_page= value, such as ABOUT_US or SHIPPINGINFO etc.
// repeat pattern as necessary
  define('META_TAG_DESCRIPTION_page_name','');
  define('META_TAG_KEYWORDS_page_name','');
  define('META_TAG_TITLE_page_name', '');

From the provided "links" I wasn't able to identify the exact setting that follows "main_page=" and didn't want to guess.