In Jupiter X you can disable Title Bar from your entire website.
By default, there are Title, Subtitle, and Breadcrumb in Title Bar and you can disable/enable each of them individually.

Note:  The changes take effect on each pages the Title Bar was set to Global. To learn more please refer to this article.

To Remove Title Bar entirely from your website

1. From the WordPress left dashboard, go to Appearance > Customize.

2. From the Customizer left dashboard, go to Title Bar menu.

3. In Content section, disable all Title, Subtitle, and Breadcrumb options.

4. Click Publish.

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