Fire crews were called to Spirit Aerosystems after some titanium dust caught fire.
It happened in the 4400 block of E. MacArthur at around 1:30 p.m. Tuesday.
Jarrod Bartlett, Spirit Aerosystems spokesman, said about 50 people were displaced from their work area due to smoke.
Hazmat crews from Sedgwick County were also called as a precaution.
The cause of the fire remains under investigation.