Tata Steel (BSE: <a href="http://uk.finance.yahoo.com/q?s=TATASTEEL.BO">TATASTEEL.BO</a> - <a href="http://uk.finance.yahoo.com/q/h?s=TATASTEEL.BO">news</a>) has agreed a deal to sell of its speciality steel assets to metal processing firm Liberty House, the Indian group said Thursday.