From 1961–1968 Davy was a resident artist at the Berlin State Opera where she sang leading roles in operas by Verdi and Puccini among other composers. During this time she also appeared as a guest artist with other opera houses in Europe. In 1961 and 1962 she sang Pamina at the Théâtre Royal de la Monnaie in Brussels. She returned there in 1969 to sing the Old Prioress in Poulenc's "Dialogues of the Carmelites"; a role she performed that same year from a wheelchair at the Grand Théâtre de Genève. She made several appearances at La Scala in Milan during the late 1950s and 1960s, portraying both Donna Anna and Donna Elvira in "Don Giovanni", Jenny in Kurt Weill's "Rise and Fall of the City of Mahagonny", Nedda, and the title role in "Madama Butterfly" among others. In 1970 she performed the role of Dido at the Teatro Regio in Parma. She remained busy with major opera houses in Europe through 1972, appearing at opera houses in Aachen, Hamburg, Strasbourg, and Mannheim among other cities. From 1973 on her singing career was more focused on concert repertoire, although she still made a few opera appearances afterwards.