Officers from the Metropolitan Police arrested the 18-year-old in Walsall as part of an operation by the counter-terrorism unit.
He was arrested at an address on suspicion of disseminating terrorist publications (contrary to Section 2 of the Terrorism Act 2006).
A spokesman for the force said: "Officers from the Met attended an address in Walsall, West Midlands, on the morning of Tuesday.
"Officers also searched the address under a warrant. The man was taken into custody, and he has since been bailed to a date in mid-February 2023.
"The investigation relates to Islamist terrorism."