• Consultancy, design and engineering services in ropes, textiles and marine systems

    • Optimoor is a unique, easy-to-use vessel mooring analysis program

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    •  World leading authority in the design of synthetic Riser Protection Net Systems

    • Moorings for Marine Renewables

      concepts, design, fabrication and installation

  • Tension Technology International (TTI) is an independent consulting group specialising in flexible tension member systems.

    TTI is an independent research, design and development company.  Established in 1986, It has consultants based in the UK, Holland, USA and China. TTI's services include design, engineering and testing of fibres, wire and fibre ropes, chain, cables, umbilicals, fabrics, mooring systems, riser protection nets and subsea tethers.

    TTI developed the Optimoor computer model for calculating response of offshore and pierside vessels, mooring line forces and fibre ropes which now has over 200 users worldwide. Fibre Rope Modeller was also developed by TTI and calculates load/extension, torque/twist, breaking load and fatigue of fibre ropes. TTI has designed several offshore synthetic rope systems for 30-year design lives, of which the oldest has seen in excess of 15 successful years’ maintenance-free service.

    TTI has brought its extensive fibre rope and mooring design expertise to the benefit of the marine renewables industry including leading a number of industry JIP's in the evolving floating offshore wind and hydrokinetic (tidal, river and wave power) technologies.  Services offered typically cover the range from conceptual design through to detailed engineering of the mooring system and its components.

    From its inception, TTI has been involved in near-industry research, including JIPs and single client studies. One of their recent research projects, funded by the Carbon Trust and partners, measured fibre rope axial stiffness and fatigue properties to provide state-of-art property data enabling the correct specification of materials and thus facilitate modelling mooring loads with confidence. TTI has considerable fibre testing experience and has conducted over 200 breaking strength, cyclic load and abrasion tests on many different rope structures and fibre types under that program.

    Each of our principals has at least 20 years experience in his field and is an internationally recognized expert. TTI has developed a dedicated facility for the testing of fibre, wire and chain tension systems. Our services include fundamental R&D, and forensic examination of failures. We also offer consultancy in technical textile structures, particularly flexible containers. TTI Testing will always offer innovative proposals on any aspect of materials testing and will design and build new equipment when required.

    • Optimoor Mooring Analysis Software view
    • TTI Marine Renewables Ltd Marine Renewable Mooring Services view
    • Riser Protection Nets (RPN) Technical Expertise view
    • Expert Witness Marine Accident Investigation view
    • Technical Inspection Services Independent Inspection, Project Management, Expediting and Testing Services view
    • Joint Industry Projects (JIP) Research and Development (R&D) view
  • Services

    Consulting services for Rope Textiles and Marine Systems

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  • Tools & Guides

    Online Tools and Guides for rope selection and design

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  • Software

    Rope Design or Mooring Service

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  • Paper & Technical Notes

    Consulting services for Rope Textiles and Marine Systems

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  • Latest News
    TTI Marine Renewables completes study into 'Failure Implications of Different Mooring Spreads and Lines'

    TTI Marine Renewables completes study into 'Failure Implications of Different Mooring Spreads and Lines'

    TTI Marine Renewables team have recently completed an in-depth study for the Offshore Renewable Energy Catapult Floating Offshore Wind Centre of Excellent (FOWCoE) assessing the ‘Risk and Failure Implications of Different Mooring Spreads and Number of Mooring Lines’. The summary report is now available to download from the FOWCoE website. Thanks to the OREC team for the collaboration on this project. We hope the summary report is a useful and interesting document for the FOW sector...Read More...
    Professor Christopher Burgoyne

    Professor Christopher Burgoyne

    Professor Chris Burgoyne We are saddened to learn of the loss of Chris. He was much admired and we are proud of our association with him. He had a formidable intellect. This is perhaps to be expected of a professor at one of the world’s great universities. Our association with him was through his interest in synthetic fibres. Recently Chris had devised a clever way of determining fibre creep; the Stepped Isothermal Method. This overcame one of the main difficulties of the traditional met...Read More...
    Optimoor Seminar 2023 - New Orleans - 7th-8th November

    Optimoor Seminar 2023 - New Orleans - 7th-8th November

    TTI is delighted to announce the relaunch of our ever popular Optimoor Seminar’s. Come and join us in New Orleans on the 7th and 8th November this year to learn about the latest Optimoor developments and features! As with previous seminar this is intended for Optimoor users of all levels of experience. Many features of the program will be discussed and demonstrated. Example mooring case studies will be presented. Opportunities will be provided for open discussions, feedback, a...Read More...
    Navigating the Mooring Landscape – A White Paper by TTI Marine Renewables Ltd

    Navigating the Mooring Landscape – A White Paper by TTI Marine Renewables Ltd

    Download white paper   Navigating The Mooring Landscape TTI and TTI Marine Renewables Ltd have been working on mooring system design for many years now.  What is clear is that it is a highly challenging optimisation process, and the conventional approach of incremental iteration can miss ideal solutions. In the field of FOWT moorings the technical and commercial challenges set out by the industry are so stringent that highly optimised solutions are required. By adopting automation ...Read More...
    Mooring & Anchoring TQ  Tool for Floating Offshore Wind - Now Live!

    Mooring & Anchoring TQ Tool for Floating Offshore Wind - Now Live!

    Mooring & Anchoring TQ tool for Floating Offshore Wind  – Now Live! A new online Mooring & Anchoring Technology Qualification (TQ) Tool which has been developed to assist stakeholders, including technology developers, to navigate the TQ landscape is now live. It was developed by Inverness based TTI Marine Renewables Ltd in collaboration with the Offshore Renewable Energy (ORE) Catapult’s Floating Offshore Wind Centre of Excellence as part of the Mooring and Anchoring S...Read More...