Sesto의 아리아(Act I) " Parto, parto, ma tu, ben mio 가겠습니다 이제 가겠습니다 그러나 그 전에 사랑하는 이여......"

Vitellia, daughter of the late emperor Vitellio (who had been deposed by Tito's father), wants revenge against Tito. She stirs up Tito's vacillating friend Sesto, who is in love with her, to act against him (duet Come ti piace, imponi). But when she hears word that Tito has sent Berenice of Cilicia, of whom she was jealous, back to Jerusalem, Vitellia tells Sesto to delay carrying out her wishes, hoping Tito will choose her (Vitellia) as his empress (aria Deh, se piacer mi vuoi).

Tito, however, decides to choose Sesto's sister Servilia to be his empress, and orders Annio (Sesto's friend) to bear the message to Servilia (aria Del più sublime soglio). Since Annio and Servilia, unbeknownst to Tito, are in love, this news is very unwelcome to both (duet Ah, perdona al primo affetto). Servilia decides to tell Tito the truth but also says that if Tito still insists on marrying her, she will obey. Tito thanks the gods for Servilia's truthfulness, and immediately forswears the idea of coming between her and Annio (aria Ah, se fosse intorno al trono).