Because Mrs implies a woman is married, using it in formal contexts seems presumptuous. Use Ms (but see below).
Mr, Mrs or Ms versus other titles
Do not combine titles and ranks such as professor, doctor, etc. with Mr or Ms. If the title is somehow separated from the name, use Mr or Ms + surname or the full name.
Chairwoman Isabel Sales asked the rector, Mr Torrelló, to speak.
Use lady only for the ceremonial title used in the United Kingdom and Commonwealth countries, and as part of the expression ladies and gentlemen.
A problem occurs in the opening salutation of letters written to unnamed individuals. Avoid translating senyor, senyora, Sr./Sra. or En/Na as Mr or Ms, and instead write Dear student, Dear faculty member or Dear colleague. If the recipients have no relationship with the university, use Dear Sir or Madam.
«Use of Mr, Mrs and Ms» [en línia]. A: Criteris de la Universitat de Barcelona (CUB). Style Guide. Barcelona: Universitat de Barcelona. Serveis Lingüístics. <http://www.ub.edu/cub/criteri.php?id=2405> [consulta: 20 setembre 2021].