What stop is this?
'Fermata' — fer-MA-ta. Stress on the second syllable; the 'r' is lightly rolled.
Ask when the train pulls into a station and you cannot see or hear the name. Ask a fellow passenger or look for the station name on the wall tiles.
'Che + noun + è…?' is a common question pattern meaning what… is…? It differs from 'Qual è…?' in nuance — 'che fermata' asks about the identity/name of this specific stop. Both patterns are widely used.
Come si chiama questa stazione?
What is this station called?
More formal version asking for the name.
Siamo a Tiburtina?
Are we at Tiburtina?
Confirms a specific station with a yes/no question.
Ho mancato la mia fermata?
Have I missed my stop?
Use if you suspect you went past your destination.
Italian metro station names are displayed on the wall tiles of the platform at regular intervals. On older rolling stock you cannot always see the name before doors close. Looking at the tiled walls of the platform as you arrive is the safest way to identify the stop.