Choosing the right topic for a doctoral thesis is not only an intellectual challenge, but also a strategic decision. Doctoral students are increasingly seeking to align their research with global trends, social needs and public or private funding streams. By 2025, this choice will become even more important due to the emergence of new fields of knowledge, the digital transformation of research and the pressure to produce a thesis with real-world applicability.
Furthermore, as the time to print their thesis approaches, many researchers consider whether their work will have an academic impact, publication prospects or career opportunities.
Academic trends by field of study
Below, we present the five most popular topics for doctoral theses in 2025, broken down by major academic disciplines, along with data, background information and practical advice.
Social Sciences and Humanities: Artificial Intelligence and Applied Ethics
Far from being the exclusive domain of computer science, generative AI (such as ChatGPT or Bard) has become a subject of study for philosophers, sociologists, political scientists and legal experts.
Spanish universities report a 21% increase in thesis proposals related to:
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Algorithmic ethics and bias in AI.
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Educational applications of artificial intelligence.
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Digital rights, privacy and European regulation (such as the EU’s AI Act).
🔎 Why is it a good choice?
An interdisciplinary approach fosters collaboration, research grants and publications in high-impact journals. Furthermore, the field is emerging and not yet saturated.
Health Sciences: post-pandemic mental health and telemedicine
According to figures from the Ministry of Universities, more than 800 theses in the field of biomedicine were defended in Spain in 2023, 30% of which focused on public health or mental health.
By 2025, the most effective approaches will be:
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The psychological impact of the pandemic on young people and healthcare professionals.
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Inequality in access to digital health services.
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Clinical trials involving eHealth tools or telecare platforms.
🔎 Practical tip: if your thesis includes results from applied research or the validation of digital tools, it will be easier to secure funding and demonstrate clinical utility during the final stages of writing and defence.
Engineering and Technology: sustainability, renewable energy and 3D printing
The focus on the green transition and smart digitalisation will set the tone for the technical theses. In fields such as architecture, civil engineering, electrical engineering and materials science, the following stand out:
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The use of 3D printing in sustainable construction.
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Optimisation of electricity grids using renewable energy.
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Smart urban waste management using IoT sensors.
A key figure: over 50% of the industrial PhD projects funded by the Ministry in 2024 were linked to the European Green Deal or the digitalisation of manufacturing.
🔎 Recommendation: include prototypes or documented experimental work. This will strengthen the value of your thesis when presented to the examination board and set you apart as an applied researcher.
Education and Learning Sciences: neuroeducation and personalised learning
With the transformation of education systems and the rise of blended learning, many universities are opting for:
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Neuroscience applied to the classroom (attention, memory, motivation).
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Adaptive, AI-powered personalised learning platforms.
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Assessment of soft skills in virtual environments.
Furthermore, the growing use of educational software and augmented reality environments opens up an interesting avenue for theses that combine technology, pedagogy and assessment.
🔎 SEO tip/impact: this type of research gains significant visibility if published in open-access journals. This will be useful if you wish to distribute a digital version of your thesis to increase citations and visibility.
Business, the economy and management: financial sustainability and digital transformation
In line with market needs, dissertations on economics and business in 2025 will focus on:
- ESG (Environmental, Social and Governance) strategies.
- Fintech, blockchain and new banking models.
- Hybrid organisational culture and leadership in remote working environments.
According to the Teseo website, the number of economics theses focusing on sustainability has risen by 18% over the last two years, reflecting demand from the business sector and new European regulations on responsible investment.
🔎 Strategic tip: if your thesis proposes a model that can be implemented by businesses, include a clear practical section; and when printing your thesis, consider a format that also allows for corporate dissemination (e.g. a separately printed executive summary).
Why is it so important to plan your thesis topic well in advance, even before printing?
Many people assume that ‘printing your thesis’ is a mechanical, purely formal step. But nothing could be further from the truth. The way you present your research influences how it will be perceived by the examination board, your university and future readers.
Furthermore, the more up-to-date, contextually relevant and aligned your research is with current trends in the academic and social spheres, the greater your chances of:
- Secure scholarships, awards or postdoctoral fellowships.
- To be cited and gain greater visibility on databases such as Dialnet, Scopus or Google Scholar.
- Publish with academic publishers specialising in emerging fields.
Are you ready to choose a thesis topic with a future?
Choosing the right thesis topic is more important than ever. It is not just a matter of fulfilling an academic requirement, but of creating a project that has an impact, is practical and has the potential to bring about change.
Whether you’re in the process of developing your idea or about to print your thesis and bring a chapter to a close, keeping 2025 trends in mind can help you stand out and make more informed decisions.
Research shouldn’t just answer questions; it should also look ahead to the future. And now is the perfect time for you to do just that.
