In 1924, he was the lead tenor in the Melba-Williamson Grand Opera tour of Australia, opening the Sydney season opposite Nellie Melba in La bohème.
On the international scene, Borgioli debuted at the Royal Opera House in London, as Edgardo in Lucia di Lammermoor, opposite Toti Dal Monte in 1925-and at the Glyndebourne Festival where he sang as Ottavio in Don Giovanni, and as Ernesto.