RadImageTile as a part of the RadTileList currently has no implementation for built-in keyboard support.

As a workaround, you can use some custom JavaScript to achieve a certain behavior.

For instance, tabindex attributes can be added to the Tiles so they can get the focus and subscribe to the keypress event of the DOM element representing the Tiles to trigger click() on certain key codes.

Here is a sample code you can use as an idea:

var $ = $telerik.$;
$(document).ready(function(){
    $('.RadTile').each(function(){
        $(this).attr("tabindex","0");
        $(this).keypress(function(event){if(event.which == 13) this.click();});
    })
})

Kind regards,
Doncho
Progress Telerik