Dr Sangay was elected as leader of the Central Tibetan Administration after the Dalai Lama retired from political life last year.
He is visiting Melbourne, Canberra and Sydney over the next week to try to gain support for his plan for a peaceful resolution to the Tibetan crisis.
He says he will speak to Australian political leaders about the worsening humanitarian situation in Tibet.
"You can't have rallies, you can't have demonstrations [in Tibet]. Even pasting posters on walls can have you arrested and tortured, often disappear[ed]," he said.
"But the situation inside Tibet is so oppressive that Tibetans are choosing to die.
"The Chinese Government seems to be cracking down more. Now they have also closed off Tibetan areas for tourists also."
Beijing insists Tibetans enjoy religious freedom and have benefited from improved living standards.
Dr Sangay says he believes there will be a resolution to the issues facing Tibet.
"The Berlin Wall came down. Nelson Mandela [spent] 27 years in prison. No one thought he could be freed. He did," he said.
"Gaddafi is gone and Hosni Mubarak. Aung San Suu Kyi just got released. She swept the 44 seats in the Parliament, just received her Nobel Peace prize.
"So I'm in that world where [if] someone says it's impossible, very difficult, I say it's possible."