In a joint address to the media after the signing of 11 bilateral agreements, Modi and his counterpart Antonio Costa said the two countries have made substantial progress in their relations in the past six months.
The agreements signed included cooperation in outer space, double taxation avoidance, nano technology, improving cultural ties, youth and sports, higher education and scientific research, and Portugal-India business hub and Indian Chamber of Commerce.
Speaking on bilateral collaboration in cutting-edge technology, Modi also announced the setting up of a joint science and technology fund of four million euros.
"Our economic ties continue to follow an upward trajectory, and we can do more for the flow of goods, services, capital and human resources," he said.
"We are also determined to deepen our cooperation against terrorism and violent extremism," he said and thanked Lisbon for its "consistent support" for India's permanent membership of the UN Security Council and multilateral export control regimes.