The title of a listing can be changed via Linnworks if the product has been listed using Linnworks, in this case, a listing will have a template:

• Edit Amazon title in Listing Descriptions section of the Edit Item menu;

• Right-click on the listing under the Channel name >  Revise Selected > Titles

Please check this guide if you would like to import new titles and edit them in bulk.

Note: Amazon uses its own validation to ensure that the product is correct. As far as we know, for some items, there is no way to directly suggest a change. For others, such as most books, there is an option labelled 'Would you like to update product info' at the bottom of the Product Details block on the Product Details page. Amazon may or may not accept your suggestions.