Turkey signalled it may send troops into Syria or Iraq and let allies use Turkish bases to fight Islamic State, as coalition jets launched air strikes on Wednesday on insurgents besieging a town on its southern border with Syria.
The government sent a proposal to parliament late on Tuesday which would broaden existing powers and allow Ankara to order military action to "defeat attacks directed towards our country from all terrorist groups in Iraq and Syria".
The proposal would also mean Turkey, until now reluctant to take a frontline role against Islamic State, could allow foreign forces to use its territory for cross-border incursions.
But President Tayyip Erdogan said the removal of Syrian President Bashar al-Assad remained a Turkish priority and stressed Ankara's fears that US-led air strikes without a broader political strategy would only prolong the instability.
Turkey accuses Assad of stoking the growth of Islamic State through sectarian policies.
"We will fight effectively against both (Islamic State) and all other terrorist organisations within the region; this will always be our priority," he told the opening of parliament, but added: "Tons of bombs dropped from the air will only delay the threat and danger.
"Turkey is not a country in pursuit of temporary solutions nor will Turkey allow others to take advantage of it."
The Islamic State advance to within sight of the Turkish army on the border has piled pressure on the Nato member to play a greater role in the US-led military coalition carrying out air strikes against the insurgents in Syria and Iraq.
The militants are encroaching on the tomb of Suleyman Shah, grandfather of the Ottoman Empire's founder, which lies in northern Syria but which Ankara considers sovereign territory. It has made clear it will defend the mausoleum.