Hi Mahesh,
The maximized item of TileView can be accessed through MaximizedItem property defined in TileView and using that item you can restore its state to 'Normal' to achieve your requirement.
Please find the sample showcasing your requirement from the following location,
http://www.syncfusion.com/downloads/Support/DirectTrac/General/TileViewSample-1687961906.zip
In the above sample we have restored the maximized item's state to 'Normal' when Restore button is clicked.
Please let us know whether the provided details assists your requirement.
Regards,
Mageshyadav.M