How to Change the Title of an RSS Feed in WordPress

1. Click the 'Settings' menu on the bottom of the Dashboard sidebar. By default, the 'General' submenu will open.
2. Change the 'Site Title' field to your new title. Scroll down and click the blue 'Save Changes' button

3. Unsubscribe to your blog's RSS in your preferred feed reader. When you resubscribe, you should see the new title. Most feed readers will not make this change automatically. If it is important to you that your current RSS subscribers see your new title, advise them to do the same.