Torra failed to realize an absolute majority in a primary parliamentary vote on Saturday however he is anticipated to be elected on Monday by easy majority after an anti-capitalist separatist occasion introduced it might abstain. Sixty-five lawmakers voted against him.
Torra's election brings an end to the political paralysis that has persisted in Catalonia since fresh regional elections on December 21 yielded a parliamentary majority for a pro-independence coalition.
Addressing the parliament on Monday, Mr Torra mentioned "Carles Puigdemont is our president".
He also said a "Republican council" would be created overseas in parallel, presided by Puigdemont, as well as an assembly composed of local officials.
A lawyer and former journalist, Torra has been active in the region's radical pro-independence movements for years, including publishing several books about Catalan history and culture.
It should also lead to Spanish Prime Minister Mariano Rajoy securing the backing he needs from regional parties to implement much-delayed central government budget plans. He reiterated that Carles Potsdamer is the President and he confirmed that his priority is the construction of a "Catalan Republic" and the constitutional process.
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Catalonia's lawmakers are meeting to end more than six months of leadership vacuum by voting in a fervent separatist as the new chief of the restive region, setting the scene for a new confrontation with Spain.
He told parliament he was "working tirelessly for the Catalan republic".
Mr Torra has been criticised by competitions for creating exactly what a few have predicted a inflammatory post from 2012, at which he explained some Catalans from Spanish-speaking wallpapers were "animals in human form that spew out hate".
Polls suggest that Catalans are virtually split down the middle on the independence issue.
Key to his election was the abstention of the far-left nationalist CUP party, announced on Sunday.
The Spanish government called the speech confrontational and a member of the Catalan parliament for Rajoy's People's Party (PP), Andrea Levy, said on Monday in a television interview that Madrid would apply direct rule again if the new administration overstepped the law.