Although Wikipedia isn’t the best source, neither Manuel II’s entry or Augusta-Victoria’s mention her being Queen other than the list of titles and their dates at the end of her article. This indicates she returned to her original title upon her second marriage.
Augusta Victoria of Hohenzollern
Titles and styles
* 19 August 1890 – 4 September 1913: Her Serene Highness Princess Augusta Viktoria of Hohenzollern
* 4 September 1913 – 2 July 1932: Her Most Faithful Majesty The Queen of Portugal and Algarves
* 2 July 1932 – 2 July 1939: Her Most Faithful Majesty The Queen Dowager of Portugal and Algarves
* 23 April 1939 – 29 August 1966: Her Serene Highness Princess Augusta Viktoria, Countess Robert Douglas
always a queen, seems to be the principle. I just realized a factual error in an earlier post: Great Britain, 1714-1718, did have a queen. It's just that Mary of Modena was the exiled widow of a deposed king who had died in 1701, the same year Parliament passed the fateful Act of Settlement.
Anyhow, my question is: HAS any woman actually been stripped of her queenly title, assuming that she even was styled with it, in the first place (I'm excluding morganatic wives from the discussion)?
The reason for my asking is that I've come to a general understanding is that a queen retains her status as such, even if she were a widow who remarried after the death of her king husband. However, I believe that there may have been an exception: I never did get a clear idea about Princess Augusta Viktoria of Hohenzollern-Sigmaringen, who married (as her first husband) the deposed King Manoel of Portugal.