TWI Ltd

TWI is a Cambridge-based research and technology organisation that helps industry with welding, joining, materials, testing and structural safety.

About TWI Ltd

TWI began life as The Welding Institute and is now a research and technology organisation owned by its industrial members. Its own purpose is to help people and organisations get the most out of welding, joining and related processes, and the products and assets that result from them, by offering independent, impartial expert advice and safety assurance. Its work covers welding and joining, coating and surface engineering, additive manufacturing (3D printing in metal), materials testing and non-destructive testing, which means checking something for flaws without damaging it.

The organisation traces its history to January 1922, when 20 men met in London to form the Institution of Welding Engineers. The research arm became the British Welding Research Association in 1946, which bought Abington Hall near Cambridge. The two bodies merged on 28 March 1968 to create The Welding Institute. TWI's research has contributed to advances in MIG and TIG welding, CTOD fracture testing, fatigue design curves and friction stir welding, a way of joining metals without melting them. Caroline Gumble became chief executive of the Welding Institute Group in July 2025.

TWI's head office is at Granta Park, near Cambridge, with about 54,000 square metres of manufacturing, testing and training space. TWI says it has five UK facilities and 13 overseas ones. UK technology centres include Middlesbrough in the North East, Catcliffe in South Yorkshire and Port Talbot in south Wales, and Aberdeen is noted as a further base. It also has branches in countries including India, Malaysia, Turkey and the UAE. The group includes The Welding Institute, TWI Training and Examinations, TWI Certification, CSWIP, TWI Software, NSIRC and the TWI Innovation Network.

TWI says it has over 800 consultants, scientists, engineers and support staff, and around 550 industrial member companies in more than 70 countries. Its work for individual clients is confidential, and the client owns the results. Its pages mention an ethos and values section, a code of conduct, a values recognition scheme and the Tipper Group, set up in 2016 to support women in engineering and diversity more widely. These are TWI's own claims.

Because TWI is so broad, it employs welding engineers, materials scientists, inspection and testing specialists, software developers, trainers, examiners and business teams. The National Structural Integrity Research Centre (NSIRC), launched in 2012, offers postgraduate education linked to industry. If you like seeing how bridges, pipelines, ships and wind turbines are built and kept safe, TWI is a leading name in UK engineering that is worth knowing about.

What they do

• {'desc': 'Welding, joining, materials and structural integrity research and advice for member companies.', 'title': 'Research and consultancy'}
• {'desc': 'Non-destructive testing, failure analysis and fitness-for-service assessment.', 'title': 'Testing and inspection'}
• {'desc': 'Courses, examinations and certification schemes in welding and inspection.', 'title': 'Training and certification'}

Key facts

• Formed 28 March 1968 by the merger of the Institute of Welding and the British Welding Research Association
• Head office at Granta Park near Cambridge; UK sites include Middlesbrough, Catcliffe and Port Talbot
• Over 800 staff and around 550 industrial member companies (TWI figures)
• National Structural Integrity Research Centre launched 2012
• Caroline Gumble chief executive of the Welding Institute Group since July 2025

Website: www.twi-global.com