Liberty House boss Sanjeev Gupta, who was arriving in Britain late today for talks, told the BBC that he had held "very encouraging" talks with the government.
He added that he would want to change the kind of furnaces at the main asset, the Port Talbot steel works in south Wales, and retrain some 700 workers.
"I won't undertake something which will require mass redundancies," Gupta said.
"It will require a lot of planning and execution and it cannot be done overnight but be planned over a number of years."
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Prime Minister David Cameron's government has been racing to find a buyer for the Tata Steel assets and save 15,000 jobs amid growing pressure from the opposition, trade unions and the press to safeguard the iconic British steel industry which dates back to the 19th century.
The Indian group announced last week it would sell off its British assets due to a global oversupply of steel, cheap imports into Europe from countries including China, high costs and currency volatility.
Trade unions are set to present an emergency plan to save jobs at the Tata Steel plants to ministers on Tuesday.
Business Secretary Sajid Javid said yesterday he was working on a plan for the government to take on some pension liabilities and reduce energy costs in a bid to make a deal more attractive to a potential buyer.
Javid wrote on Twitter this evening: "Just held productive meeting with senior Tata executives to discuss UK steel sales process. Progress is being made."