In the alumino-thermic process, aluminium acts as ___________.

In the alumino-thermic process, aluminium acts as a reducing agent.
Alumino thermic process is an exothermic process in which aluminium is used as a reducing agent at high temperatures. This process is used for the production of iron alloys. For example, the reaction between iron oxide and aluminium produces iron.
${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_2{\mathrm{O}}_3+2\mathrm{Fe}$