3D printing and composites transform aerospace production and maintenance

Lightweight, agile manufacturing key to defence and aviation sectors

The aerospace sector is embracing 3D printing and composite materials to enhance production efficiency, reduce part weight, accelerate prototyping, and improve maintenance, despite certification challenges, notably within stringent standards of the defence industry.

India’s aerospace sector is witnessing a significant transformation with the growing adoption of 3D printing and advanced composite materials, technologies that promise to revolutionise production and maintenance processes within military and commercial aviation. India’s aerospace parts market, valued at USD 13.6 billion in 2023, is poised for rapid growth fuelled by the integration of additive manufacturing (AM) techniques into its supply chain. This leap forward was highlighted by the strategic partnership between Godrej Enterprises Group, the space engineering arm of Mumbai-based conglomerate and the German 3D printing titan EOS.

The collaboration aims to scale complex aerospace part production, particularly metal components for aircraft and spacecraft, by deploying EOS’s cutting-edge multi-laser metal 3D printers at Godrej’s Mumbai facilities.

The use of 3D printing, combined with composites such as carbon fibre, has been praised by industry insiders for the agility and performance improvements it brings.

“Composites and 3D printing have revolutionised the industry. We can rapidly prototype drone parts, test them, and make adjustments thanks to 3D printing, all in a few days as opposed to weeks. Cutting drone weight without sacrificing strength is made possible by advanced composites like carbon fibre, which improves performance and extends flight time, two essentials for both defence and agriculture and defence use,” Danish Ghori, Co-Founder, Airbot Aerospace, an Indian drone startup, tells Media India Group.

This efficient prototyping cycle has a profound impact on development timelines and operational readiness, especially crucial for sectors reliant on drone technology. However, while the technological promise is abundant, aerospace-grade certification remains a significant hurdle, especially for defence industry whose standards are among the most rigorous globally.

“It is very difficult to certify these parts, the biggest obstacle is demonstrating consistency, all components need to function precisely the same every time. Even minor adjustments to the material or printing temperature can affect the quality of composites and 3D printing,” Ghori adds.

To address this, Airbots Aerospace says it adheres to stringent Standard Operating Procedures (SOPs), subjecting each component batch to material integrity analysis, stress testing and dimensional verification. They often produce triplicates where two units are destructively tested to validate the third’s reliability, ensuring mission-readiness to meet unforgiving operational demands.

Complementing composites and metals, the role of advanced ceramics fabricated through 3D printing is also evolving rapidly, particularly for aerospace engine components. According to research from CUMI Aerodefence, materials science company, the global ceramic 3D printing market was valued at USD 284 million in 2024 and is projected to grow almost tenfold to USD 2.7 billion by 2033 driven by aerospace demand.

Complex turbine blades with intricately designed cooling channels, impossible to machine conventionally, rely on 3D printed ceramic cores from materials like silicon carbide and aluminum oxide, which confer exceptional heat resistance and structural strength. Indian materials science firms are actively engaging with the aerospace sector to develop indigenous 3D ceramic printing capabilities.

This broadening spectrum of materials and processes is driving a new era of agile manufacturing in aerospace maintenance, repair, and overhaul (MRO). The benefits of additive manufacturing here are profound since parts can be printed on demand, substantially reducing downtime caused by delayed imports or obsolete spares. For specialised drone systems or legacy aircraft, 3D printing offers mission-critical support with replacement parts produced in hours instead of weeks.

The Indian aerospace industry exemplifies this trend with Hindustan Aeronautics Limited (HAL) collaborating with Wipro 3D to design and manufacture metal 3D printed aerospace components, including MRO parts.

In India, Selective Laser Sintering (SLS) and Directed Energy Deposition (DED) technologies stand out as pivotal in expanding industrial 3D printing for aerospace. SLS facilitates the creation of robust, complex nylon and composite parts without support structures, enabling new design freedoms crucial for lightweight, high-strength components. DED allows precise adding or repairing of high-performance metals like titanium and nickel alloys, vital for aerospace and defence applications with stringent durability requirements. These advancements contribute to reducing costs, improving efficiencies, and enabling a more self-reliant aerospace manufacturing ecosystem in India.

The composite materials market in Indian aerospace and defence is forecast to grow at a CAGR of 6 pc from 2024 to 2030, reaching USD 67 million by the end of the decade. Composites such as carbon fibre reinforced polymers are integral to reducing weight while maintaining or enhancing structural strength in aircraft and UAVs, thereby boosting fuel efficiency and payload capabilities.