According to Book VIII of Virgil's epic Aeneid, Tiberinus helped Aeneas after his arrival in Italy from Troy, suggesting to him that he seek an alliance with Evander of Pallene in the war against Turnus and his allies (see founding of Rome). Tiberinus appeared to Aeneas in a dream, telling him he had arrived at his true home. Tiberinus also calmed the water so that Aeneas' boat was able to reach the city safely.  With Manto, Tiberinus was the father of Ocnus.
Tiberinus is also known as the river god who found the twins Romulus and Remus and gave them to the she-wolf Lupa (who had just lost her own cubs) to suckle. He later rescued and married Rhea Silvia, the mother of the twins and a Vestal Virgin who had been sentenced to death.
Tiberinus was considered to one of the most important river-gods and people made sure to put offerings in the Tiber River every May. Tiberinus was honored with twenty-seven straw dummies which were called Argei.