[maryz]

I think it was always two for beatification; used to be three for canonization, but they changed it to two IIRC.

[Salvation]

Vatican to encourage greater caution in opening sainthood causes
Pope clarifies Church’s traditions, norms for canonization; announces new instruction
They Need A Miracle Will a future pope relax the rules for sainthood?
Role of Miracles In Sainthood Eyed
Saint-making Pope is ready to ditch the miracle clause
Contribution to a Canonization
Catholic Biblical Apologetics: The Canonization of Saints: Current Canonization Process, Biblical Description of Miracles