Consequently to this position, following the granting of the Statuto Albertino in 1848, he was elected to the Subalpine Parliament for the constituency of Sassari on 15 January 1849.

[2] In the Subalpine Parliament he sided with the left and immediately opposed the armistice of Novara, considering it an attack on the standing and honor of Italy.

In 1852 he took the side of the Chamber against the state of siege decreed by the government in the province of Sassari, while in 1855 when cholera broke out in the city he distinguished himself in his constant activity aimed at combating the epidemic.

When in 1865 Giovanni Lanza invited him to take the Ministry of Public Education, he refused as he did not consider it right for him to serve in that government.

Ferracciu remained in Parliament after his ministerial career was over and died during his last mandate, on 2 March 1892, in Rome, aged 76.