The phrase "a key topic to" is correct and usable in written English.
It can be used when introducing an important subject or theme that is relevant to a discussion or analysis.
Example: "In our meeting, we will address a key topic to the success of our project: effective communication among team members."
Alternatives: "an important issue regarding" or "a crucial subject for".
Therefore, the study of the bond behavior of FRCM composites is a key topic to develop reliable design procedures.
Integration of anaerobic digestion (AD) with microalgae processes has become a key topic to support economic and environmental development of this resource.
The separation and classification of intense wind events into homogeneous families is a key topic to study the wind-excited response of structures and to determine the distribution of extreme wind velocities and extreme wind-induced effects.
How new morphological variation arises along the course of evolution is a key topic to understand how diversity is generated and maintained [ 1- 3].
Understanding how these molecules act on dysfunctional cells remains a key topic to clarify disease mechanisms and to evaluate their use for therapies.
Chipotle's ability to win back diners is vital to reviving sales and is expected to be a key topic at the company's annual meeting on Wednesday.
Reducing the rates of maternal mortality became a key topic at the UN summit to review development goals last month, with the aim of reducing rates by three-quarters by 2015.
NATO's performance in running the air campaign was expected to be a key topic at a meeting of NATO foreign ministers in Germany later this week.
"Politics was always a key topic at dinner parties," says Anne-Claire Taittinger, a cousin and former head of the family firm.
The aging workforce was a key topic at the recent World Economic Forum meeting in Davos, Switzerland.
The use of femtocells, which are overlaid over the traditional macrocell based cellular networks is a key topic related to the deployment of new infrastructure in a cost-effective manner[3 5].
