In 1870, however, Italian troops captured Rome and it became the capital of the Kingdom of Italy. Betti continued to undertake political roles in the developing country.
Sa 1870, gayunman, Italian tropa nakunan Roma at ito ay naging kabisera ng Kaharian ng Italya. Betti patuloy na magsagawa ng pampulitikang mga tungkulin sa pag-unlad ng bansa.