Hello vinay uthappa,
In order to remove the header part of the RadTileViewItem you'll have to edit the default tileViewItem template. Could you please examine the attached project and see if it is of any help to you? In the project I've created two different headerless templates for the RadTileViewItem - with the first one you can't drag the items and with the second one you can.
If you have more questions feel free to ask.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items