Australia will significantly deepen economic and defence ties with Singapore through an expansion of the countries' free trade agreement and a major boost to the number of Singaporean troops training in Queensland.

Former trade minister Andrew Robb has clinched the deal, which aims to elevate ties with Singapore to the same level as Australia-New Zealand relations.

Outgoing Trade Minister Andrew Robb has clinched the deal. Credit:Alex Ellinghausen

Prime Minister Malcolm Turnbull, Mr Robb and Trade Minister Steve Ciobo will on Friday announce the agreement, under which Singapore will build $2.25 billion of new defence infrastructure, including new barracks, making it the only country beyond the United States to invest in military infrastructure on Australian soil.

The Comprehensive Strategic Partnership, begun by former prime minister Tony Abbott and his counterpart, Lee Hsien Loong, more than a year ago, represents a major boost to the strategic relationship amid the rise of China and the growing uncertainty across Asia.