Insofar as titles are concerned, Afonso was, first and foremost, Infante of Portugal.
The Infante Afonso was born during the reign of his father, Luís I, and, at birth, he was granted the title, Duke of Porto.
He became Prince Royal of Portugal under unfortunate circumstances.
His brother, Carlos I, and his nephew, were assassinated in 1908, whereupon Manuel II became king and Afonso was acknowledged as the heir to the throne, a position that takes the title, Prince Royal.

Before becoming Prince Royal, Afonso fulfilled the charges of 51st Viceroy of Portuguese India and 24th Constable of Portugal.
He was the 109th and last Governor of Portuguese India to receive the title of viceroy, which is reserved, as a high personal reward for service to Portugal, to aristocracy of the highest standing and royalty only.

He received the following awards:
Grand Cross of the Sash of the Two Orders (Portugal)
Grand Cross of the Order of the Immaculate Conception of Vila Viçosa (Portugal)
Grand Cross of the Order of St. Stephen, 1888 (Austria-Hungary)
Grand Cross of the Saxe-Ernestine House Order, 1885 (Ernestine duchies)
Knight of the Annunciation, 1893 (Italy)
Knight of the Black Eagle (Prussia)
Knight of the Rue Crown (Saxony)
Knight of the Order of the Royal House of Chakri, 23 October 1897 (Siam)
Knight of the Golden Fleece, 11 December 1883 (Spain)
Grand Cross of the Order of Charles III, 11 December 1886 (Spain)
Knight of the Seraphim, 24 December 1883 (Sweden-Norway)
Honorary Grand Cross of the Royal Victorian Order, 7 April 1903 (United Kingdom)
Insofar as titles are concerned, Afonso was, first and foremost, Infante of Portugal. The Infante Afonso was born during the reign of his father, Luís I, and, at birth, he was granted the title, Duke of Porto. He became Prince Royal of Portugal under unfortunate circumstances. His brother, Carlos I, and his nephew, were assassinated in 1908, whereupon Manuel II became king and Afonso was acknowledged as the heir to the throne, a position that takes the title, Prince Royal.
Before becoming Prince Royal, Afonso fulfilled the charges of 51st Viceroy of Portuguese India and 24th Constable of Portugal. He was the 109th and last Governor of Portuguese India to receive the title of viceroy, which is reserved, as a high personal reward for service to Portugal, to aristocracy of the highest standing and royalty only.
He received the following awards:
Grand Cross of the Sash of the Two Orders (Portugal)
Grand Cross of the Order of the Immaculate Conception of Vila Viçosa (Portugal)
Grand Cross of the Order of St. Stephen, 1888 (Austria-Hungary)
Grand Cross of the Saxe-Ernestine House Order, 1885 (Ernestine duchies)
Knight of the Annunciation, 1893 (Italy)
Knight of the Black Eagle (Prussia)
Knight of the Rue Crown (Saxony)
Knight of the Order of the Royal House of Chakri, 23 October 1897 (Siam)
Knight of the Golden Fleece, 11 December 1883 (Spain)
Grand Cross of the Order of Charles III, 11 December 1886 (Spain)
Knight of the Seraphim, 24 December 1883 (Sweden-Norway)
Honorary Grand Cross of the Royal Victorian Order, 7 April 1903 (United Kingdom)
Afonso, Duke of Porto