The crossword solution for the term 'Portuguese Title with a Tilde' is SAO, which stands for São, the Portuguese word for Saint. São is often used in Portuguese titles, such as São Paulo, the largest city in Brazil. It is also used in the names of many Portuguese saints, such as São Francisco de Assis. The tilde (~) is a diacritical mark that is used to indicate a nasal sound in Portuguese words. It is often used in conjunction with São to form titles and names.